30th Marian Smoluchowski Symposium on Statistical Physics

Session

Session 4

5 Sept 2017, 09:00

Conveners

Session 4: Panel B

• Lukasz Machura (University of Silesia)

Session 4: Panel C

• Maciej Majka (Jagiellonian University)

54. Induced motion of a probe in contact with a nonequilibrium medium

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.

34. Nonergodic dynamics in the plasma membrane of living cells

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...

154. How to measure load-dependent kinetics of individual motor molecules without a force-clamp

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,...

114. Isothermal Langevin dynamics in systems with power-law spatially dependent friction

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...

76. Large deviations of surface height in the Kardar-Parisi-Zhang equation

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...

49. Modelling heart rhytm variability in heart transplant patients by cellular automata on complex networks

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...