Bogdan Cichocki
(Instytut Fizyki Teoretycznej Uniwersytetu Warszawskiego)
04/09/2017, 09:30
oral
$\;$
Katja Lindenberg
(University of California, San Diego)
04/09/2017, 10:00
oral
We discuss synchronization of arrays of coupled two-state stochastic oscillators with additional fluctuations due to finite numbers of units, types and ranges of couplings, memory effects, etc. If time permits we present phase diagrams
J. Miguel Rubi
(University of Barcelona)
04/09/2017, 11:00
oral
We show how active transport of ions can be interpreted as an entropy facilitated process. In this interpretation, a particular change in the pore geometry through which substrates are transported gives rise to a driving force. This chemical energy provided by the chemical reaction is then used to create a protein geometry favorable for the uphill transport of ions. Attempts to estimate the...
Peter Hänggi
(University of Augsburg)
04/09/2017, 11:30
oral
The case of strong system-environment coupling plays an increasingly seminal role when it comes to describe systems of small size which are in contact with an environment. The commonly known textbook situation refers solely to a weak coupling situation for which the equilibrium state of the system is described by a Gibbs state. This situation changes drastically, however, when strong coupling...
Dante Chialvo
(Center for Complex Systems & Brain Sciences (CEMSC3). Universidad Nacional de San Martin & CONICET. San Martin, Buenos Aires, Argentina)
04/09/2017, 12:00
oral
The organization of biological form and function is a classic problem, cut-crossing disciplines, which include a variety of complex spatiotemporal patterns. Historically, work focussed first into the understanding of self-organization and later attention shifted to scale-free collective fluctuations, many of them shown to correspond to critical phenomena. In that context, I will review our...
74.
A tribute to Marian Smoluchowski's legacy on colloid type matter aggregation, and related issues
Adam Gadomski
(UTP University of Science and Technology Bydgoszcz, Poland)
04/09/2017, 14:30
oral
In 1916 Marian Smoluchowski proposed a case of constant-kernel cluster cluster aggregation, for which it is manageable to find analitycally by employing scaling arguments, a solution in terms of the cluster size (k) distribution function, n(k) [1,2].
By applying this scaling function it is then possible to get, within the long times' limit, the results for the mean cluster size {k} and the...
Leticia, F Cugliandolo
(Universite Pierre et Marie Curie)
04/09/2017, 14:30
oral
We study the dynamics of classical disordered macroscopic models
completely isolated from the environment reproducing, in a classical
setting, the ‘quantum quench’ protocol. We use two classes of models,
distinguished by the complexity of their energy landscape. We identify
quenches after which the evolution approaches a stationary state that can
be associated to equilibrium at a single...
Jerzy Luczka
(University of Silesia)
04/09/2017, 14:30
oral
Anomalous diffusion can be detected in various systems. We show that
anomalous diffusion may emerge in a straightforward, one dimensional
classical nonequilibrium dynamics of a Brownian particle moving in a ratchet
potential and driven by both an unbiased time-periodic force and thermal
fluctuations of Gaussian nature. In a tailored parameter regime for which the
deterministic counterpart...
Eli Barkai
(Bar-Ilan University, Israel)
04/09/2017, 15:00
oral
We investigate the quantum first detection problem for a quantum walk
using projective measurement postulates.
A simple relation between the measurement free state function |psi> and |phi>_n is obtained,
the latter
is the first detection amplitude at the n-th attempt. This relation is the quantum renewal equation, its classical counter part is widely used to find statistics of first...
Denis Grebenkov
(CNRS)
04/09/2017, 15:00
oral
In 1917, von Smoluchowski founded the first mathematical theory of diffusion-limited reactions by computing the diffusive flux towards a perfect spherical sink. In spite of many advances over the past hundred years, stationary diffusion in complex media with numerous sinks of various shapes and reactivities remains poorly understood. After a brief overview, we present a recently developed...
Ivan Marchenko
(National Scientific Centre “Kharkov Institute of Physics and Technology”)
04/09/2017, 15:00
oral
The phenomena of diffusion over a potential energy landscape play a key role in a number of processes in physics, chemistry and biology. In this talk a set of original theoretical results on diffusion enhancement of underdamped Brownian particles in symmetric space-periodic potential due to external forcing is presented [1-5].
We demonstrate that depending on the value of the constant...
Davide Valenti
(Department of Physics and Chemistry, University of Palermo)
04/09/2017, 15:20
oral
Phytoplankton lies at the base of the food chain of seas and oceans, and it is responsible for about 80% of the total *chlorophyll a*. As a consequence, phytoplankton determines the trophic structures of marine ecosystems, while influencing the total abundance and the spatial distributions of marine biological species, e.g. fish populations. Thus the study of spatio-temporal dynamics of...
Thomas Franosch
(Universität Innsbruck)
04/09/2017, 15:20
oral
We consider a tracer particle on a lattice in the presence of immobile obstacles. Starting from
equilibrium, a force pulling on the particle is switched on, driving the system to a new stationary
state. We solve for the complete transient dynamics of the fluctuations of the tracer position
along the direction of the force. The analytic result, exact in first order of the obstacle...
Bernardo Spagnolo
(University of Palermo)
04/09/2017, 15:30
oral
We shortly review the transient dynamics of mesoscopic systems, such as Josephson junctions, in noisy environments. The role of noise induced solitons and breathers on the mean switching time from the superconducting metastable state to the resistive state, in the presence of an external noise source modeled by α-stable Lévy distributions, will be outlined.
Thereafter, the dissipative...
Rafal Abdank-Kozubski
(M. Smoluchowski Institute of Physics, Jagiellonian University in Krakow)
04/09/2017, 15:40
oral
Self-diffusion and the ‘order order’ relaxation process in intermetallic compounds is described in terms of effective atomic jump frequencies and the current degree of chemical long-range order. It is demonstrated that the thermodynamic activation energies of self-diffusion and the ‘order-order’ relaxation can be expressed in terms of the activation energies of more elementary processes. As...
Andreas Dechant
(Kyoto University)
04/09/2017, 15:40
oral
Bounds on the current generating function for stochastic dynamics and the thermodynamic uncertainty relations that follow from them have recently attracted much attention. Here, we focus on the space-time continuous case of Langevin dynamics. We derive a variational formula for the generating function of a generalized current, which is valid at finite time, extending the previously known...
Wladyslaw Adam Majewski
(The Gdansk University)
04/09/2017, 16:30
oral
We present a new rigorous approach based on Orlicz spaces for the description of the statistics of large regular statistical systems, both classical and quantum. We emphasize that the presented formalism is applicable to QFT!
The pair of Orlicz spaces we explicitly use are respectively built on the exponential function
(for the description of regular observables) and on an entropic type...
Anna Carbone
(Politecnico di Torino)
04/09/2017, 16:30
oral
The talk is addressed to the analysis of time sequences of Markov correlated events give rise to a line power spectrum having a relevant physical interest. In particular, Markov matrices able to represent closed loop sequences of events with arbitrary distribution, generated in a steady physical condition, generate a large set of line spectra, covering a very broad frequency range. The...
Ken Sekimoto
(Univ. Paris-Diderot & ESPCI)
04/09/2017, 16:30
oral
We will describe the basic idea and some applications of the processes when the system's degrees of freedom are progressively quenched. This work has been done in collaboration with Bruno Ventejou and Michael Etienne (paper in preparation).
S. H. E. Rahbari
(KIAS)
04/09/2017, 17:00
oral
Soft particulate media include a wide range of systems involving athermal dissipative
particles both in non-living and biological materials. Characterization of flows of particulate
media is of great practical and theoretical importance. A fascinating feature of these systems
is the existence of a critical rigidity transition in the dense regime dominated by highly
intermittent...
Rudolf Hilfer
(Universitaet Stuttgart)
04/09/2017, 17:00
oral
Local equilibrium states change slowly in time because they
are almost stationary. As a consequence local equilibrium states
have to be related to local states that are time-invariant.
It has been argued in the literature that a proper mathematical
formulation of local equilibrium states must start from the class
of time-invariant measures for infinitely extended systems [1].
This...
Aneta Stefanovska
(Physics Department, Lancaster University)
04/09/2017, 17:00
oral
Marian Smoluchowski provided an explanation of the Brownian motion of particles. The equation for a particle's displacement in space that he proposed in 1906 provided an important basis for the theory of stochastic processes. This initiated the whole new field of stochastic dynamics that blossomed during the last century. In this talk we will discuss what happens to the particles if external...
Maciej Majka
(Jagiellonian University)
04/09/2017, 17:20
oral
Despite the decades of intense research, the glass transition, i.e. the extreme rise in the viscosity (by $10^{14}$ for molecular and $10^3$ for colloidal glasses) of the disordered system as it becomes denser/colder, is far from being fully understood. One important limitation here is the lack of analytically solvable models for the systems with arbitrary interactions. In this presentation...
Prof.
Karol Penson
(University Paris 6)
04/09/2017, 17:30
oral
We analyze the properties of combinatorial numbers appearing in the normal ordering of powers of certain differential operators. They are natural generalizations of the conventional Bell numbers. We explicitly construct the solutions of the Stieltjes moment problems with these combinatorial sequences. It turns out that in certain cases one encounters as solutions the discrete probability...
Harald Posch
(University of Vienna)
04/09/2017, 17:30
oral
One-dimensional particle systems are known to be anomalous with respect to
the dynamics of their hydrodynamic conserved fields and their related
currents. We review some of the predictions of mode-mode coupling theory
combined with exact results by Prähofer and Spohn [J. Stat. Phys., vol. 115, 255
(2004)] to derive asymptotic expressions for the time-correlation functions
of the...
Holger Kantz
(Max Planck Institute for the Physics of Complex Systems)
04/09/2017, 17:35
oral
Long range temporal correlations (LRC)
in noise-like signals can be detected through
the scaling behaviour of the mean squared displacement (MSD) of the pathes
which one obtains by integrating over the signal. Detrended fluctuation
analysis has become a standard tool which beyond a simple MSD analysis is able
to remove the effects of trends on the signal. In the first part of this...
Christian Maes
(KU Leuven)
05/09/2017, 09:00
oral
We discuss how contact with a nonequilibrium bath can modify the effective dynamics of a probe. In particular, systematic forces may become nongradient; the second fluctuation-dissipation relation can be broken and the noise may be nonGaussian and showing power law distributed jumps.
Igor Sokolov
(Humboldt University Berlin)
05/09/2017, 09:00
oral
Anomalous transport in flows is often invoked in discussion of anomalous transport phenomena as described by continuous-time random walk (CTRW) or Levy walk (LW) schemes. The first model describes the particles' transport in eddy lattices, and the model of a Levy walk interrupted by rests describes the transport in flows which consist of eddies and jets. The models adequately describe the...
Diego Krapf
(Colorado State University)
05/09/2017, 09:00
oral
Tracking individual proteins on the surface of live mammalian cells reveals complex dynamics involving anomalous diffusion and clustering into nanoscale domains. Theoretical models show that anomalous subdiffusion can be caused by different processes. Here we study the nonergodic dynamics of voltage gated ion channels in human embryonic kidney (HEK) cells and in hippocampal neurons. We perform...
Jae Hyung Jeon
(Department of Physics, Pohang University of Science and Technology(POSTECH))
05/09/2017, 09:30
oral
Localization of messenger ribonucleoproteins (mRNPs) plays an essential role in the regulation of gene expression required for long-term memory formation and neuronal development. Knowledge concerning the nature of neuronal mRNP transport is thus crucial for understanding how mRNPs are delivered to their target synapses. In this talk, we show experimental and theoretical evidence that the...
Henrik Flyvbjerg
(Department of Micro- and Nanotechnology, Technical University of Denmark, Kongens Lyngby, Denmark)
05/09/2017, 09:30
oral
Molecular motors are responsible for numerous cellular processes from cargo transport to heart contraction. Their interactions with other cellular components are often transient and exhibit kinetics that depend on load. Here, we measure such interactions using a new method, “Harmonic Force Spectroscopy.” In this method, harmonic oscillation of the sample stage of a laser trap immediately,...
Oded Farago
(Ben Gurion University)
05/09/2017, 09:30
oral
We study the dynamics of Brownian particles in a heterogeneous one-dimensional medium with a spatially-dependent diffusion coefficient of the form $D(x)\sim|x|^c$, at constant temperature. The particle’s probability distribution function (PDF) is calculated both analytically, by solving Fick’s diffusion equation, and from numerical simulations of the underdamped Langevin equation. At large...
Ralf Metzler
(University of Potsdam)
05/09/2017, 10:00
oral
In 1905 Einstein formulated the laws of diffusion, and in 1908
Perrin published his Nobel-prize winning studies determining Avogadro's
number from diffusion measurements. With similar, more refined techniques
the diffusion behaviour in complex systems such as the motion of tracer
particles in living biological cells is nowadays measured with high precision.
Often the diffusion turns out...
Baruch Meerson
(Hebrew University of Jerusalem)
05/09/2017, 10:00
oral
The Kardar-Parisi-Zhang (KPZ) equation describes an important universality class of nonequilibrium stochastic growth. There has been much recent interest in the one-point probability distribution P(H,t) of height H of the evolving interface at time t. I will show how one can use the optimal fluctuation method (also known as the instanton method, the weak-noise theory, the macroscopic...
Danuta Makowiec
(Institute of Theoretical Physics and Astrophysics, University of Gdansk)
05/09/2017, 10:00
oral
In patients with end-stage heart disease the heart transplantation (HTx) is associated with significant improvement in survival and in quality of life. However strong immunosuppressive drugs together with processes of aging could lead to vasculopathy and fibrosis of the donor heart. Moreover a spontaneous process of reinnervation proceeds in the myocardial tissue. All together impact on...
Alessandro Fiasconaro
(Universidad de Zaragoza, Spain)
05/09/2017, 11:00
oral
The G-quadruplexes (G4) are non-canonical secondary DNA and RNA structures composed of four guanine basis bonded each other in a quartets forming piled planes. They have been found both in vivo and in vitro cultures, and have important role in telomere end-protection, and chromosome stability. Their folding patterns and structures are also found in eukaryotic promoter regions of oncogenes,...
Hyunggyu Park
(Korea Institute for Advanced Study)
05/09/2017, 11:00
oral
Equilibrium is characterized by its fundamental properties such as the detailed balance, the
fluctuation-dissipation relation, and no heat dissipation. Based on the stochastic thermodynamics,
we show that these three properties are equivalent to each other in conventional Langevin thermal
systems with microscopic reversibility. Thus, a conventional steady state has either all...
Robert Alicki
(University of Gdansk)
05/09/2017, 11:00
oral
A standard textbook picture of solar, thermoelectric and fuel cells based on a direct transformation of light, heat or chemical energy into a direct current (DC) contradicts the basic principles of electrodynamics and thermodynamics. The proposed solution of this problem involves a single oscillating degree of freedom called work reservoir (depository) or a piston, which executes...
Aleksei Chechkin
(Akhiezer Institute for Theoretical Physics)
05/09/2017, 11:30
oral
A growing number of biological, soft, and active matter systems are observed to exhibit normal diffusive dynamics with a linear growth of the mean-squared displacement, yet with a non-Gaussian distribution of increments. Based on the Chubinsky-Slater idea of a diffusing diffusivity, we here establish and analyze a minimal model framework of diffusion processes with fluctuating diffusivity. In...
Michael Lomholt
(University of Southern Denmark)
05/09/2017, 11:30
oral
I will discuss the long time asymptotic behavior of a tagged particle in two dimensional systems, where the particles are stuck with their neighbors. This corresponds to single-file diffusion in one dimension, where the mean squared displacement of a particle grows with the square root of time. In two dimensions it turns out that the mean square displacement grows logarithmically. I will show...
Andrzej M. Oles
(Jagiellonian University)
05/09/2017, 11:30
oral
Exchange interactions in orbital models are frustrated even on a
square lattice, where two $T=1/2$ pseudospin components
$T_i^{\gamma}(\theta)$ parameterized by angle $\theta\in(0,\pi/2]$ interact by terms $JT_i^{\gamma}(\theta)T_j^{\gamma}(\theta)$.
Maximal frustration in the quantum compass model with
$T_i^{\gamma}(\pi/2)\equiv\frac12\sigma_i^{\gamma}$, where
$\sigma_i^{\gamma}$ is...
Ken Funo
(Peking University)
05/09/2017, 11:50
oral
Path integral formalism of quantum mechanics and quantum field theory
has greatly influenced the theoretical developments of physics. For
example, a path integral description of open quantum systems has been
used to study the dissipative dynamics of the quantum systems, known as
the Caldeira-Leggett model of the quantum Brownian motion. Studies of
thermodynamics in the dissipative quantum...
Anna Ochab-Marcinek
(Institute of Physical Chemistry, Polish Academy of Sciences)
05/09/2017, 11:50
oral
Stochasticity in gene expression is one of the most important problems of quantitative biology. It has been shown that, in the systems as small as living cells, production of proteins is strongly affected by random fluctuations coming from various sources. As a result, the biological noise is a meaningful factor influencing cellular processes and cell-fate decisions. The particular questions...
Rina Schumer
(Desert Research Institute)
05/09/2017, 12:00
oral
The notion that the kinematics of sediment transported in streams is well-represented by quasi-random motions amenable to Smoluchowski-type diffusion was first proposed by Hans Albert Einstein at his renowned father’s suggestion. Since then, there have been attempts to adapt formalisms of diffusion and anomalous diffusion developed for thermodynamic systems to the start-and-stop and spatially...
Bartlomiej Waclaw
(University of Edinburgh)
05/09/2017, 12:10
oral
Bacterial conglomerates such as biofilms and microcolonies are ubiquitous in nature and play an important role in industry and medicine. In contrast to well-mixed cultures routinely used in microbial research, bacteria in a microcolony interact mechanically with one another and with the substrate to which they are attached. Here we use a computer model of a microbial colony of rod-shaped cells...
Karen Hovhannisyan
(Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark)
05/09/2017, 12:10
oral
Work is one of the central notions in (statistical) mechanics and thermodynamics. In fact, it is *the* quantity that connects thermodynamics and mechanics. Unlike in the macroscopic regime, at the microscale, fluctuations of work become relevant and sometimes even dominant, which makes their characterization a question of fundamental importance. In classical mechanics, the solution is...
Czeslaw Jedrzejek
(Poznan University of Technology)
05/09/2017, 14:00
oral
Machine learning (ML), a fundamental concept of AI research, has recently been dominated by advanced statistical techniques (known as deep learning). The origin the methods comes from network optimization and prior knowledge of brain with serious physics inputs. The progress in theoretical architectural models (such as Recurrent Neural Networks (RNN, Convolutional Neural Networks, Long...
Robert Holyst
(Institute of Physical Chemistry PAS)
05/09/2017, 14:00
oral
Molecular engines are based on different principles than macroscopic motors. I will present two examples: artifical engine created in our lab namely nano-wind mill driven by evaporation of water and the motion of kinesin motor walking on microtubules. This biological engine, of incredibly efficiency, is driven by thermal noise, while consumption of ATP is mainly used for detachment of its...
Yuval Garini
(Bar Ilan University)
05/09/2017, 14:30
oral
The DNA in a human cell is ~3 meters long. It is dynamic and yet is well organized. What are the mechanisms that organizes the chromatin and chromosomes in the nucleus?
Using dynamic methods in live cells, we identified a mechanism that maintains the genome organization in the nucleus. We claim that lamin A forms chromatin loops by lamin A dimers (or oligomers) thereby restricting the...
Andrzej Fulinski
(M. Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, Kraków, Poland Polish Academy of Arts & Sciences, Sławkowska 17, 31-016 Kraków, Poland)
05/09/2017, 14:30
oral
Detection and quantification of presence of memory in various stochastic and chaotic processes is discussed. Short introduction of definitions, signatures, and measures is presented, and several examples of the application of the introduced formalism are discussed in detail.
These examples show that nonmarkovian are: most of proceses with stationary correlation function $C(t,s)=C(|t-s|)$...
Massimiliano Giona
(University of Rome La Sapienza DICMA)
05/09/2017, 14:50
oral
Langevin equations driven by vector-valued Wiener noise
represent the prototypical model
of evolution equations for a physical system driven
by a deterministic velocity field in the presence of
superimposed stochastic fluctuations. The statistical
nature of a Wiener process
can be
regarded as the natural legacy of a large number ansatz, in which
the effects of many unknown and...
Ludvig Lizana
(Umeå University)
05/09/2017, 15:00
oral
In living cells, proteins often bind to specific basepair sequences on DNA, such as transcription factor proteins that regulate gene expression, or restriction enzymes that cut the DNA at cleavage sites. These proteins search for targets that are about 10 basepairs long, on a DNA that is a few mega basepairs in bacteria, and billions in humans. This sounds like a needle in a haystack- problem...
Aleksander Weron
(Hugo Steinhaus Center, Faculty of Pure and Applied Mathematics, Politechnika Wrocławska)
05/09/2017, 15:10
oral
The Nobel Prize in Physiology or Medicine 2009 was awarded for the discovery of how chromosomes are protected by telomeres and the enzyme telomerase. The Nobel Prize in Chemistry 2012 was given for studies of G-protein-coupled receptors and the Nobel Prize in Chemistry 2014 was presented for the development of superresolved fluorescence microscopy. Definitely, the research behind these Nobel...
Geza Odor
(MTA-EK-MFA, Research Center for Energy, Hungarian Academy of Sciences)
05/09/2017, 15:15
oral
Extended numerical simulations of threshold models have been performed on a human brain network with
N=836733 connected nodes available from the Open Connectome Project [1]. While in the case of simple
spreading models like contact process, SIS or threshold model a sharp discontinuous phase transition, without any critical dynamics arises, variable threshold models exhibit extended...
Sang Hoon Lee
(Korea Institute for Advanced Study)
05/09/2017, 16:00
oral
We study the efficiency of a quantum dot engine in the condition of the maximum power output. In contrast to the quasi-statically operated Carnot engine whose efficiency reaches the theoretical maximum, recent research on more realistic engines operated in finite time has revealed other classes of efficiency such as the Curzon-Ahlborn efficiency maximizing the power. The linear coefficient of...
Peter McClintock
(Department of Physics, Lancaster University)
05/09/2017, 16:00
oral
The passage of ions through biological cell membranes [1] is essential for life at all levels. It occurs via ion channels through proteins embedded in the membrane, and involves Brownian motion under the influence of powerful electrostatic forces. The permeation process is highly selective, e.g. in valence selectivity a calcium channel selects Ca$^{2+}$ over Na$^+$ by up to 1000:1. There is...
Jaesung Lee
(Korea Institute for Advanced Study)
05/09/2017, 16:15
oral
In thermodynamics, there exists a conventional belief that “the Carnot efficiency is reachable only when a process is reversible.” However, there is no theorem proving that the Carnot efficiency is impossible in an irreversible process. Here, we show that the Carnot efficiency is attainable in an irreversible process through investigation of the Feynman-Smoluchowski ratchet (FSR). Thus, this...
Rainer Klages
(Queen Mary University of London)
05/09/2017, 16:30
oral
Consider equations of motion that generate dispersion of an ensemble of particles. For a given dynamical system an interesting problem is not only what type of diffusion is generated by its equations of motion but also whether the resulting diffusive dynamics can be reproduced by some known stochastic model. I will discuss three examples of dynamical systems generating different types of...
Chulan Kwon
(Myongji University)
05/09/2017, 16:35
oral
We consider a classical open system in contact with heat bath via interaction Hamiltonian. We investigate two forms of energy transfer via the change of interaction Hamiltonian, which are interpreted as heats. One is heat dissipation from the system and the other is heat absorption by the heat bath, which are usually expected to be the same. Since the change of interaction Hamiltonian leads to...
Eugene Postnikov
(Kursk State University)
05/09/2017, 16:55
oral
Modern developments in single particle tracking not only open new perspectives for the study of molecular motions in complex environments,
but also allow for using these motions as a probe for revealing properties of substrates on which the motions occur. This approach is
especially important for studying biological membranes since their non-uniform structure (e.g. due to the presence of...
Srabanti Chaudhury
(Indian Institute of Science Education and Research)
05/09/2017, 17:00
oral
Single molecule techniques allow researchers to study not only the average reaction rates but also the statistics of single molecule transitions in the context of enzymatic reactions. Such measurements show that the slow fluctuation between enzyme conformers can lead to fluctuations in the rate constants of the reaction, a phenomenon known as dynamic disorder [1]. The most accessible...
Zbigniew Grzywna
(Silesian University of Technology, Faculty of Chemistry)
05/09/2017, 17:10
oral
From a reach family of nonlinear diffusion equations the Burgers’ and Porous Medium equations have been chosen to demonstrate the possibility of getting their analytical solutions of some practically important IBVs problems. A comparison between numerical and analytical solutions have also been provided.
Lukasz Machura
(University of Silesia)
05/09/2017, 17:20
oral
Colorectal cancer remains to be one among 5 most common types of cancer found for both men and women. Typically multimodal treatment including surgery, radiation and chemotherapy is applied. The electrical activity of external anal sphincter can serve as a potential source of knowledge of the actual state of the patient. The signals registered by means of the surface electromyography are...
Alberto Imparato
(University of Aarhus, Department of Physics and Astronomy)
06/09/2017, 09:00
oral
We present a minimal model
of autonomous thermal motor, made of two interacting
Brownian particles, sitting on two periodic potentials, and kept at different temperatures. We show that such a system does not require ratchet potentials (with
, e.g., an asymmetric saw-tooth shape) in order to exhibit direct
transport, but presents a spontaneous symmetry breaking.
Both the dynamic and...
Sergey Bezrukov
(National Institutes of Health, Bethesda, MD 20892, USA)
06/09/2017, 09:00
oral
Recent experiments with single biological nanopores, as well as single-molecule fluorescence spectroscopy and pulling studies of protein and nucleic acid folding raised a number of questions that stimulated theoretical and computational studies of the barrier crossing dynamics. We focus on trajectories of Brownian particles that escape from traps either in the presence of an external force or...
Stefano Ruffo
(SISSA)
06/09/2017, 09:20
oral
Spontaneous synchronization is a cooperative phenomenon common in nature which makes oscillators of different frequencies, if strongly coupled, operate together with a single common frequency. Such cooperative effects occur in physical and biological systems over length and time scales of several orders of magnitude. Examples: are flashing of fireflies, rhythmic applause in a concert hall,...
Gleb Oshanin
(Laboratoire de Physique Théorique de la Matière Condensée (UMR CNRS 7600) Sorbonne Universités - UPMC, Paris, France)
06/09/2017, 09:30
oral
In this talk I overview our recent results [1] on the mean first escape time T of a diffusive particle from a spherical (or a circular) domain enclosed by an impenetrable boundary containing a small escape window. Our settings differ from the classical narrow escape problem in two aspects : First, we introduce explicitly into the model long-range potential interactions of a particle with the...
Anandamohan Ghosh
(Indian Institute of Science Education and Research Kolkata)
06/09/2017, 09:50
oral
The collective dynamics of coupled units arranged on a random network exhibits complex dynamics ranging from synchronization to spatio-temporal chaos. It is often important to identify if perturbations spread across the network or are confined locally, in
the presence of quenched disorder. The spectrum of Lyapunov exponents, quantifying the sensitivity to perturbations, can be analyzed...
Gerald Kneller
(University of Orleans / CNRS)
06/09/2017, 10:00
oral
Gerald Kneller
Centre de Biophysique Moléculaire
CNRS/University of Orléans, France
Quasielastic neutron scattering (QENS) from biomolecular systems, such as proteins, probes essentially the diffusive single particle dynamics of the hydrogen atoms. As far as the internal dynamics is considered, the motion of the hydrogen atoms exhibits both multiscale and quantum properties. Starting...
Sakuntala Chatterjee
(S.N. Bose National Centre for Basic Sciences, Kolkata, India)
06/09/2017, 10:05
oral
We demonstrate particle clustering on macroscopic scales in a coupled nonequilibrium system where two species of particles are advected by a fluctuating landscape and modify the landscape in the process. The phase diagram generated by varying the particle-landscape coupling, valid for all particle density and in both one and two dimensions, shows novel nonequilibrium phases. While particle...
Gerhard Naegele
(Forschungszentrum Jülich, ICS-3)
06/09/2017, 11:00
oral
We present a joint theory, simulation and experimental study of collective and self-diffusion in concentrated suspensions of charged colloidal particles. The study is based on the generalized Smoluchowski diffusion equation accounting both for direct and solvent-mediated hydrodynamic interactions, and it spans the range from the colloidal short-time to the long-time regime. Owing to the large...
Lutz Schimansky-Geier
(Department of Physics, Humboldt-University at Berlin)
06/09/2017, 11:00
oral
An often used model for an active entity is the two dimensional stochastic microswimmer. It moves due to a propulsive mechanism with constant speed and changes the direction due to deterministic and random torques. Despite the simplicity, the model it is not an overdamped situation. Intertia is reflected by an initial ballistic behaviour. Only after an crossover time being the relaxation time...
Fernando Oliveira
(Universidade de Brasília)
06/09/2017, 11:30
oral
We present a method to derive analytically the growths exponents of a eroded surface whose dynamics is ruled by cellular automata. Starting from the automata, we write down the time evolution for the height's average and height's variance (roughness). We apply the method to the etching model[1,2] of $1+1$ dimensions, than we obtain the dynamical exponents, which perfectly match the...
Liubov Tupikina
(Ecole Polytechnique)
06/09/2017, 11:30
oral
Solute transport and, particularly, diffusion of particles in porous media is a long standing problem [1].
The general random walks framework has been shown to describe quantitatively the anomalous
transport patterns frequently observed in fractured and heterogeneous porous media [2]. One of the major conceptual difficulties consists in a very broad range of time and length scales in the...
Juan Ruben Gomez Solano
(Universitaet Stuttgart)
06/09/2017, 11:45
oral
The motion of many natural microswimmers, e.g. bacteria and spermatozoa, commonly takes place in viscoelastic fluids and under confinement close to solid walls. The understanding of their swimming mechanisms has triggered a lot of experimental and theoretical work in recent years as well as the development of self-propelled colloidal particles. Although the motion of such synthetic...
Tadeusz Kosztolowicz
(Institute of Physics, Jan Kochanowski University in Kielce)
06/09/2017, 12:00
oral
We consider subdiffusion in a system which consists of two homogeneous media joined together; subdiffusion parameters can be different in both media [1,2]. We also consider subdiffusion with absorption in a composite system. The application of the theoretical model to describe a real diffusion processes in the considered system is also presented. Confronting the theoretical formulas with the...
Felix Thiel
(Bar-Ilan University)
06/09/2017, 12:00
oral
We consider the question of when a quantum system initially prepared in state A first ``arrives'' in state B, i.e. the first arrival problem in quantum physics.
To determine the arrival, the observer attempts to detect the system stroboscopically with fixed period via a projective measurement.
The time of the first successful detection attempt is the first detection time.
The corresponding...
Piotr Garbaczewski
(University of Opole)
06/09/2017, 12:15
oral
We consider the random dynamics in a bounded domain, while concentrating on somewhat unexplored links between the absorbing and inaccessible boundarz data impact upon random motion. Both Brownian and Levy-stable dynamics will be discussed , with a focus on tyhe long term surival, and the permanent trapping scenarios.
Oleksandr Kliushnychenko
(Institute of Physics, NASU, Kiev, Ukraine)
06/09/2017, 12:15
oral
The effect of concentration-dependent switching of the wake-mediated interaction between obstacles in a gas flow of interacting Brownian particles is presented. When increasing bath fraction exceeds half-filling, the interaction between obstacles switches from effective attraction to repulsion or vice-versa, depending on the mutual alignment of obstacles with respect to the gas flow. It is...
Grassberger Peter
(Forschungszentrum Juelich)
06/09/2017, 14:00
oral
We have now institutes for complex systems, conferences on complex systems, and journals of complex systems. So most of us have a good feeling what is a complex system. But what is complexity itself, and is there any way to measure it? The answer to this is surprisingly non-trivial. Indeed, there is no universally agreed concept, according to which a bacterium is more complex than a human. But...
Itamar Procaccia
(The Weizmann Institute of Science)
06/09/2017, 14:30
oral
The special challenge of Nonlinear Physics is that every new problem calls
for a specialized idea and a new method to solve it. There exist almost no "general" methods
in the arsenal. I will review my own forays into the nonlinear domain stressing this challenge
and highlighting the few lucky strikes that I had been involved in during more than 35 years of research.
Laura Foini
(École Normale Supérieure, Paris)
06/09/2017, 15:00
oral
In Gibbs equilibrium, fluctuation-dissipation relations can be generically used to
probe the thermal properties of the system and measure its temperature.
When the system under study is integrable, though, the dynamics fails to approach such a Gibbs state, reaching instead a generalized ensemble with a macroscopic number of temperature-like parameters which enforce the value of the...
Edgar Roldan
(Max Planck Institute for the Physics of Complex Systems)
06/09/2017, 15:30
oral
The laws of thermodynamics can be extended to mesoscopic systems for which energy changes are on the order of the thermal energy are relevant. Therefore, thermodynamic observables associated with mesoscopic degrees of freedom are stochastic. A key example of such thermodynamic observable is the stochastic entropy production in nonequilibrium processes. Little is known beyond fluctuation...
Pierpaolo Vivo
(King's College London)
06/09/2017, 16:45
oral
Matrices with random entries - much like cats - enjoy several lives. Studied in one context, they usually prove more useful in another, giving rise to more and more baffling challenges and unexpected twists as time goes by. But, the field of random matrices is also plagued by false myths, inaccurate historical accounts, and true gems that - while jealously kept from our colleagues - would...
Gregory Schehr
(Universite Paris-Sud, CNRS)
06/09/2017, 17:15
oral
I will review some recent results exploring the connection between non-interacting fermions in a d-dimensional trapping potential and random matrix theory. The presence of the trap introduces an edge where the average density of fermions vanishes. Far from the edge, near the centre of the trap (the so called "bulk regime"), physical properties of the fermions have traditionally been understood...
Martin Bier
(East Carolina University)
08/09/2017, 09:00
oral
Nonequilibrium systems commonly exhibit Levy noise. This means that the distribution for the size of the Brownian fluctuations has a "fat" power tail. Large Brownian kicks are then more common as compared to the ordinary Gaussian distribution that is associated with equilibria.
$ $
We consider a two-state system, i.e. two wells and in between a barrier that is sufficiently high for a...
Jaroslaw Paturej
(University of Szczecin)
08/09/2017, 09:00
oral
Polymer bottlebrushes provide intriguing features being relevant both in nature and in synthetic systems. While their presence in the articular cartilage optimizes synovial joint lubrication, bottlebrushes offer pathways for fascinating applications, such as within super-soft elastomers or for drug delivery. However, the current theoretical understanding lacks completeness, primarily due to...
Gianni Pagnini
(BCAM - Basque Center for Applied Mathematics, Bilbao, Basque Country - Spain)
08/09/2017, 09:20
oral
Fractional kinetics is derived from Gaussian processes when the medium where the diffusion takes place is characterized by a population of length-scales [1]. This approach is analogous to the generalized grey Brownian motion [2], and it can be used for modelling anomalous diffusion in complex media. In particular, the resulting stochastic process can show sub-diffusion, ergodicity breaking, p...
Maria L. Ekiel-Jezewska
(Institute of Fundamental Technological Research, Polish Academy of Sciences)
08/09/2017, 09:20
oral
The characteristic time scales of the translational and rotational Brownian diffusion for nanoparticles are typically much smaller than time resolution of the experiments. In this case, nanoparticles can be treated as point-like, and described by the standard Brownian theory. However, for microparticles, the characteristic Brownian time scales are of the order of seconds, and therefore...
Adam Kleczkowski
(University of Stirling, Scotland)
08/09/2017, 09:30
oral
One of the key contributions of Marian Smoluchowski was to show that even small, apparently random, contributions from individuals can combine to produce significant shifts in the collective behaviour. This paradigm is not limited to physics but has become increasingly influential in biological and social sciences. Models have been developed to describe such diverse systems like the market...
Andrea Cairoli
(Imperial College London)
08/09/2017, 09:35
oral
The motion of a tracer particle in a complex medium typically exhibits anomalous diffusive patterns, characterised, e.g, by a non-liner mean-squared displacement and/or non-Gaussian statistics.
Modelling such fluctuating dynamics is in general a challenging task, that provides, despite all, a fundamental tool to probe the rheological properties of the environment.
A prominent example is...
Christian Rohwer
(Max Planck Institute for Intelligent Systems)
08/09/2017, 09:40
oral
Non-equilibrium systems are known to exhibit long-ranged correlations in the presence of dynamical conservation laws. This phenomenon gives rise to various types of fluctuation-induced forces between objects immersed in non-equilibrium media. However, driving systems out of equilibrium, for instance by changing their temperature, may also result in changes of the mean density.
$ $
In...
Jacek Miekisz
(Institute of Mathematics, Polish Academy of Sciences and University of Warsaw)
08/09/2017, 09:50
oral
We formulate two simple and intuitive criteria for evolutionary stability of pure Nash equilibria in stochastic dynamics of finite populations. Our approach is based on the mapping of continuous stochastic dynamics into discrete ones and the appropriate choice of potential functions. We present the correspondence between one-dimensional stochastic differential equations describing diffussion...
Lukasz Kusmierz
(RIKEN Brain Science Institute)
08/09/2017, 09:50
oral
Most living organisms perform two different types of search: a directed search (taxis) and a random
search. The former is observed when the environment provides cues to guide the motion towards targets,
whereas the latter may not involve any memory and information processing and can be modeled by ran-
dom walks. There is a large body of experimental results showing that the random walk...
Paolo Malgaretti
(Max Planck Institute for Intelligent Systems)
08/09/2017, 10:00
oral
Recent studies have shown that the presence of boundaries can strongly affect the dynamics of physical systems.
For example, negative mobility and fluid recirculation occurs when an electrolyte is driven in a varying-section channels[1], rectification occurs active particles such as molecular motors[2] or active swimmers[3] moving in inhomogeneous environments and off--diagonal terms in the...
Katarzyna Gorska
(Institute of Nuclear Physics, Polish Academy of Sciences)
08/09/2017, 10:05
oral
I will present the results for fractional equations of Fokker-Planck type using evolution operator method. I will employ exact forms of one-sided Levy stable distributions to generate a set of self-reproducing solutions. Explicit cases are reported and studied for various fractional order of derivatives, different initial conditions, and for different versions of Fokker-Planck operators.
Andrzej Krawiecki
(Faculty of Physics, Warsaw University of Technology)
08/09/2017, 10:10
oral
Majority vote model on random graphs and scale-free networks is investigated, in which a
fraction p of agents (called contrarians or anticonformists)
follows an antiferromagnetic update rule, i.e., they assume, with
probability governed by a parameter q (0 < q < 1/2), the opinion opposite to that of the majority
of their neighbors, while the remaining 1-p fraction of agents follows the...
Anna Maciolek
(ICHF PAN)
08/09/2017, 10:15
oral
Using mesoscopic numerical simulations and analytical theory we investigate
the coarsening of the solvent structure around a colloidal particle emerging after a
temperature quench of the colloid surface. Qualitative differences in the coarsening mechanisms are found,
depending on the composition of the binary liquid mixture forming the solvent and on the adsorption preferences of the...
Christopher Jarzynski
(University of Maryland, College Park)
08/09/2017, 11:00
oral
As famously articulated by Sir Arthur Eddington, the second law of thermodynamics implies a directionality to the flow of time: the arrow of time points in the direction of increasing entropy. This deep fact of Nature is something that we intuitively grasp in our everyday lives, which is why we typically find it easy to distinguish between a movie played forward in time, and one played...
Wojciech Zurek
(Los Alamos)
08/09/2017, 11:30
oral
A system in equilibrium does not evolve: time independence is its telltale characteristic. However, in Newtonian physics microstate of an individual system (a point in its phase space) evolves incessantly in accord with its equations of motion. Ensembles were introduced in XIX century to bridge that chasm between continuous motion of phase space points in Newtonian dynamics and stasis of...
Pierre Gaspard
(Universite Libre de Bruxelles (U.L.B.))
08/09/2017, 12:00
oral
On the basis of microreversibility, fluctuation relations are established for the counting statistics of coupled currents flowing across classical or quantum systems sustaining nonequilibrium steady states. Thanks to these relations, the Green-Kubo formulae and the Casimir-Onsager reciprocity relations can be generalized from linear to nonlinear response properties. These advances provide a...
Yann Lanoiselée
(PMC lab - École Polytechnique)
poster
Recent progresses in single particle tracking have shown evidences of
non-Gaussian distribution of displacements in biological media either
near the cellular membrane or inside the cytoskeleton. A similar
behavior has also been reported in granular media, turbulent flows,
gels, colloidal suspensions. Its emergence in various fields suggests
that this is a general feature of diffusion in...
Kamila Sofinska
(Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, Kraków, Poland)
poster
Understanding the dynamic properties of interacting molecules is an important issue in the field of designing micro and nano drug carriers or transfection systems. One of the most powerful research methods of these properties is dynamic force spectroscopy that allows to determine the interactions strength between single molecules, the local Young's modules or the energy landscapes. This...
Teodor Buchner
(Faculty of Physics, Warsaw University of Technology)
poster
Due to outspread of WiFi technology, which utilized stream ciphers, ARC4 has once become the most widespread stream cipher in the world. The idea of the cypher is to use a deterministic dynamics, with strong mixing properties in order to produce a pseudorandom trajectory of symbols, identically distributed, with minimal correlations. A pair of ARC4 sharing common initial condition (secret key)...
Jakub Slezak
(Wroclaw University of Science and Technology)
poster
We study the behaviour of time-averages for stationary (non-ageing), but ergodicity-breaking Gaussian processes using their representation in Fourier space. We provide explicit formulas for various time-averaged quantities, such as mean square displacement, density, and analyse the behaviour of time-averaged characteristic function, which gives insight into rich memory structure of the studied...
Miao Yu
(Department of Biotechnology, Delft University of Technology, Delft, the Netherlands)
poster
The interaction between protein and polyelectrolytes is relevant for the development of protein drug delivery systems [1]. The formation and growth of protein-polyelectrolyte complexes has been monitored experimentally by nanoparticle tracking analysis (NTA) and flow imaging microscopy (MFI) [2]. Although Smoluchowski’s theory was able to describe the agglomeration in this system, it can be...
Wojciech Radosz
(Wrocław University of Science and Technology)
poster
We study theoretically the kinetics of non-interacting photo-switchable guest molecules (model azo-dye) dispersed in host (model polymer matrix) in the all-optical poling process close to the glass transition temperature Tg. The polymer matrix is simulated using the bond-fluctuation model. The kinetics of multiple trans-cis-trans cycles is formulated in terms of transition probabilities which...
Tomasz Gubiec
(University of Warsaw)
poster
An extended version of the Continuous-Time Random Walk (CTRW) model with memory is herein developed [1,2].
This memory involves the dependence between arbitrary number of successive jumps of the process while waiting times between jumps are considered as i.i.d. random variables.
This dependence was established analyzing of empirical histograms for the stochastic process of a single share...
Fernando Oliveira
(Universidade de Brasília)
poster
We present for the first time in detail the set of the main critical exponents associated with the phase transition of the Kuramoto model under multiplicative noise action. This was done considering the equilibrium thermodynamics for the states of synchronization [1], as well as the subsequent analysis of the critical behavior of the free energy and entropy of the model. We reinforce the...
Michał Cieśla
(M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland)
poster
Preparation of a membrane with prescribed properties, which can provide a chance to control mass transport and decide about the time and number of particles released from the membrane is nowadays one of great importance scientific problems. In our previous papers it was shown that at intermediate and long time-scale the diffusion type depends on the membrane structure but not on the specific...
Agata Wawrzkiewicz-Jalowiecka
(Silesian University of Technology, Faculty of Chemistry)
poster
We analyze how changes of channel pore geometry during membrane depolarization can influence transport properties of Kv 1.2 channel protein. Spatial confinements of the channel give rise to entropic barriers which effectively influence its ability to transport the potassium ions through the membrane.
First, on the base of structures of the channel in an open state at membrane depolarization...
Paulina Trybek
(Silesian Center for Education and Interdisciplinary Research, University of Silesia, Chorzow, Poland)
poster
Physiological systems are characterized by high dynamical complexity, which is conditioned by their ability to adapt in incessantly changing environment. Loss of such complexity can be related with occurring the pathological state, what has been gained widespread use in biomedical signal analysis.
Among the nonlinear methods that take into account an internal structure of the signal together...
Karol Capała
(Institute of Physics, Jagiellonian University)
poster
Individuals building populations are subject to variability. This variability affects progress of epidemic outbreaks, because individuals tend to be more or less resistant. Agents also differ with respect to their recovery rate. Here, properties of the SIR model in inhomogeneous populations are studied. It is shown that a small change in model's parameters, e.g recovery or infection rate, can...
Sergey Matveev
(Institute of Numerical Mathematics, RAS)
poster
In this work we present an expansion of fast numerical method for Smoluchowski
aggregation equations with additional unary fragmentation terms. The method is based on
use of low-rank matrix decomposition of kernel kinetic coefficients and fast methods of linear algebra. We also present its application to local model of aggregation in soil profile and discuss results of our numerical experiments.
JAE HYUNG Jeon
(Department of Physics, Pohang University of Science and Technology(POSTECH))
,
Ludvig Lizana
(Umeå University)
,
Sang Hoon Lee
(Korea Institute for Advanced Study)
poster
In this post-genome sequence era, the investigation of the genomic interactions on top of the identified sequence is of great importance. There exist nontrivial structural properties in the interactions, despite the fact that the sequence itself is a topologically simple one-dimensional structure. In particular, topologically associated domains (TADs), representing the group or modular...
Ryszard Wojnar
(Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk)
poster
Smoluchowski's diffusion, [1], it is a diffusion in an external field is studied, and a general kinetic equation valid within the framework of classical statistical mechanics is found.
$ $
We apply Stecki's projection operator method, [2], to obtain a kinetic equation for an auxiliary distribution function f(k,v_1,t). This function yields the intermediate scattering function I_s(k,t),...
Katarzyna Jesionek
(Institute of Physics, University of Silesia, 40-007 Katowice, Poland and Silesian Center for Education and Interdisciplinary Research, University of Silesia, 41-500 Chorzow, Poland)
poster
The convection-diffusion-reaction equation can be used to model the transport of the low-density lipoproteins (LDL) in the
arterial wall. LDL is a lipoprotein associated with the development of the atherosclerotic plaque and coronary artery disease. In this poster we present LDL concentration profiles obtained for patient specific right coronary artery. The case with normal pressure
and...
Andrzej Jarynowski
(Smoluchowski Institute of Physics, Jagiellonian University)
poster
Problem: Recent rapid spread of the African Swine Fever (ASF) in the Northeast Poland during summer 2017 encourages us to prepare risk assessment for the whole country and predict future geographical transmission paths. The disease has been occurring in Poland since February 2014, however, only in 2017 it exceeded the so-called population reproduction number of the epidemic (adjusted epidemic...
Paweł Karbowniczek
(Institute of Physics, Cracow University of Technology, Poland)
poster
We study the role of excluded-volume effects for the stabilization of different phases in systems composed of hard bent-core particles placed on a planar surface. In particular, we analyze molecular systems, in which modulated phases can appear. By the use of combined theoretical and simulational approaches, such as Onsager's Density Functional Theory and Monte Carlo simulations, we...
Konrad Jałowiecki
(Institute of Physics, University of Silesia in Katowice, Katowice, Poland)
poster
We consider time evolution of genuinely multipartite entangled $N$-qubit states initially prepared in the form of $X$-matrices.
In the scenario that we analyse, one qubit of the considered system is coupled to the thermal environment modelled using the rigorous
Davies theory. We present analytical formulae for the genuinely multipartite concurrence in such system as a function of time both...
Aleksandra Slapik
(University of Silesia)
poster
We study impact of inertia on directed transport of a Brownian particle under non-equilibrium conditions: the particle moves in a one-dimensional periodic and symmetric potential, is driven by both an unbiased time-periodic force and a constant force, and is coupled to a thermostat of temperature T. Within selected parameter regimes this system exhibits negative mobility, which means that the...
Srabanti Chaudhury
(Indian Institute of Science Education and Research)
poster
The translocation dynamics of a polymer chain driven through a nanopore by an external bias between the cis and trans side of the chain is a far from equilibrium process. With the emergence of single molecule techniques, the translocation of a polymer can be studied by applying a mechanical force on one end of the polymer by using an optical or a magnetic tweezer. In this work, we consider the...
Raul Salgado-Garcia
(Universidad Autonoma del Estado de Morelos)
poster
We study the transport properties of non-interacting overdamped particles, moving on tilted disordered potentials, subjected to Gaussian white noise. We give exact formulas for the drift and diffusion coefficients for the case of random potentials resulting from the interaction of a particle with a “random polymer”. In our model the random polymer is made up, by means of some stochastic...
Arkadiusz Jędrzejewski
(Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology)
poster
We investigate the q-voter model with stochastic noise arising from independence on complex networks. Using the pair approximation, we provide a comprehensive, mathematical description of its behavior and derive a formula for the critical point. The analytical results are validated by carrying out Monte Carlo experiments. The pair approximation prediction exhibits substantial agreement with...
Fernando Oliveira
(Universidade de Brasília)
poster
In this work, we propose a methodology that bears close resemblance to the Fourier analysis of the first harmonic to study networks subjected to pendular behavior [1]. In this context, pendular behavior is characterized by the phenomenon of people's dislocation from their homes to work in the morning and people's dislocation in the opposite direction in the afternoon. Pendular behavior is a...
Paweł Karbowniczek
(Institute of Physics, Cracow University of Technology, Kraków, Poland)
poster
Using Onsager-type of Density Functional Theory and constant pressure MC simulations we study the effect of conformational degrees of freedom on orientational and positional ordering of trimer-like molecules confined to monolayers.
The molecules are composed of three linked line segments. Each of the terminal segments is allowed to occupy one of the two internal states: α and -α, where α...
Aydin Deger
(Department of Applied Physics, Aalto University, Finland)
poster
Originally introduced to explain the behavior of a condensing gas, Lee-Yang zeros have nowadays become a universal and powerful tool for the unified description of phase transitions in equilibrium and non-equilibrium systems, see for example [1, 2]. Here, we use Lee-Yang zeros to analyze a paradigmatic model for thermal phase transitions in molecular systems. For the most simple version of...
Rogelma Ferreira
(Universidade Federal do Recôncavo da Bahia)
poster
We examine the pattern solutions in a generalized nonlocal logistic map that includes spatial kernels in both growth and competition terms. We show that this map includes as a particular case the nonlocal Fisher–Kolmogorov equation, and we demonstrate the
existence of three kinds of stationary nonlinear solutions: one uniform, one cosine type that we refer to as wavelike solution, and another...
Artem Ryabov
(Charles University)
,
Ekaterina Berestneva
(Charles University)
poster
We focus on an overdamped two-dimensional diffusion of a particle in a corrugated tilted periodic potential. The particle is subjected to two white noise sources with different intensities representing two heat baths at different temperatures. The model dynamics mimics a working principle of the famous Feynman ratchet and pawl. Using a perturbation expansion in potential width, which is...
Paweł Bialas
(Department of Theoretical Physics, University of Silesia)
poster
Models which contain quantum particle coupled to its environment were
analysed many times over recent years or even decades. Nonetheless this old and seemingly well known
problem contains some unknown aspects and have not been solved in the general
case. Furthermore by analysing behaviour of quantum Brownian motion one could
attempt to find answer for many fundamental questions concerning...
Tommaso Vanzan
(University of Geneva)
poster
We consider a one-dimensional quantum system with off diagonal disorder, consisting of a sample of conducting regions
randomly interspersed within potential barriers.
Results mainly concerning the large $N$ limit are presented and it is shown that the disordered model converges to the periodic case as the number of barriers increases, with a rate of convergence which depends on the disorder...
Piotr Kubala
(M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland)
poster
Study of properties of hard objects random packings provide insight into a structure of granular media, soft- and bio-matter as well as heterogeneous or composite materials. Numerical modeling of such packing, reveals rules responsible for different processes occurring in them like for example self-assembly of nanoparticles or glass formation, etc.
One approach to random packings uses...
Jeremi Ochab
(M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków)
poster
Statistical significance of network clustering has been an unresolved problem since it was observed that community detection algorithms produce false positives even in random graphs. After a phase transition between undetectable and detectable cluster structures was discovered [1,2], the spectra of adjacency matrices and detectability limits were shown to be connected, and they were calculated...
Rodrigo Lima
(Universidade Federal de Alagoas)
poster
This study aims at presenting the calculate the transmission probabilities of Dirac particles through a graphene nanoribbon (GNR) with a barrier-like potential. Using the Dirac equation with continuity condition for wave functions at the interfaces between regions with and without a potential, it was calculated the mode-dependent transmission probability for both semiconducting and metallic...
Marcin Lobejko
(University of Silesia)
poster
Stochastic dynamics of a quantum system driven by statistically independent random sudden quenches is studied. We show that with growing frequency of random quenches the system smoothly approaches deterministic limit indicating self-averaging of its temporal evolution. Moreover we reveal that there is an effective (constant) Hamiltonian generating time evolution of self-averaged system ...
Jakub Jędrak
(Instytut Chemii Fizycznej PAN, ul. Kasprzaka 44/52, 01-224 Warszawa)
poster
Stochasticity in gene expression is one of the most important problems of quantitative biology. It has been shown that, in the systems as small as living cells, production of proteins is strongly affected by random fluctuations coming from various sources. As a result, the biological noise is a meaningful factor influencing cellular processes and cell-fate decisions. The particular questions...
19.
Stronger selection can slow down evolution driven by recombination on a smooth fitness landscape
Masahiko Ueda
(Department of Basic Science, The University of Tokyo)
poster
Stronger selection implies faster evolution---that is, the greater the
force, the faster the change. This apparently self-evident proposition,
however, is derived under the assumption that genetic variation within a
population is primarily supplied by mutation (i.e. mutation-driven
evolution). Here, we show that this proposition does not actually hold
for recombination-driven evolution,...
Michał Cieśla
(M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland)
poster
The relationship between membranes morphology, which is characterized by different parameters, and the characteristics of diffusive transport in the membranes is studied. Membranes comprising of polymer with dispersed inorganic fillers are characterized by polymer matrix density, its fractal dimension, the average size of domains and average number of near obstacles. Diffusive transport is...
Maciej Majka
(Jagiellonian University)
poster
The interest in the extracellular vesicles (EVs) is rapidly growing as they became reliable biomarkers for many diseases. For this reason, fast and accurate techniques of EVs size characterization are the matter of utmost importance. One increasingly popular technique is the Nanoparticle Tracking Analysis (NTA), in which the diameters of EVs are calculated from their diffusion constants. This...
Wojciech Radosz
(Wrocław University of Science and Technology)
poster
We study a q-voter model with stochastic driving on a complete graph with q being a random
variable described by probability density function P(q), instead of a constant value. We investigate two types of P(q): (1) artificial with the fixed expected value < q >, but a changing variance and (2) empirical of freely forming groups in informal places. We investigate also two types of...
Katarzyna Lewandowska
(Medical University of Gdansk)
poster
We present a method of deriving a boundary condition for diffusion at a thin membrane from experimental data. Within this method the Laplace transform of a boundary condition is assumed to be in the form
$ $
$
\hat{C}_2 (0^+,p)=\hat{\Phi}(p)\hat{C}_1(0^-,p)\;,
$
$ $
where $\hat{\Phi}(p)$ is a function to be determined. Next, we find the Laplace transform of some theoretical...
Artem Ryabov
(Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Prague, Czech Republic)
poster
We present a theory describing the recently proposed and realized microwave amplifier based on the negative resistance of a damped Josephson junction [P. Lahteenmaki et al., Sci. Rep. 2, 276 (2012)]. The standard linear response theory based on expansion around the limit cycle [A. Kamal et al. Phys. Rev. B 86, 144510 (2012)] yields nearly perfect results for the gain characteristics of the...
Davide Cocco
(Università di Roma La Sapienza)
poster
In this contribution we explore the derivation
of quantum mechanics from a classical
field theory, or more precisely from a thermodynamic
approach involving two field phases. This attempt
is in line with the analysis of Laughlin and Pines on
the emergent characters of physical laws, including
quantum physics (PNAS, 97, 2000, 28).
The first
part of the presentation analyzes in...
Yuichi Itto
(Aichi Institute of Technology)
poster
Virus capsid exhibits an exotic diffusion phenomenon in a cell nucleus [1,2]. The distribution of the diffusion exponent takes a universal Gaussian form for two different types of the virus. Here, the statistical property of the local fluctuations of the diffusion exponent over the nucleus is discussed [3]. It is shown that the statistical distribution of the fluctuations derived by an...
Jacek Grela
(LPTMS, Universite Paris-Sud)
poster
We study transient behaviour in the dynamics of complex systems described by a set of non-linear ODE’s. Destabilizing nature of transient trajectories is discussed and its connection with the eigenvalue-based linearization procedure. The complexity is realized as a random matrix drawn from a modified May-Wigner model. Based on the initial response of the system, we identify a novel...
