36th M. Smoluchowski Symposium on Statistical Physics: Soft Matter, Information Processing and Nonequilibrium Fluctuations

Coarse-grained description of stochastic dynamics and field theoretic models for complex systems

25 Sept 2023, 17:05

25m

Faculty of Physics, Astronomy and Applied Computer Science; Jagiellonian University

Regular Talk Session 5

Speaker

Prof. Shankar Prasad Das (Professor of Physics)

Description

The continuum field theoretic approach to describing a many-particle system has been very useful in understanding its thermodynamic and time-dependent behaviour. Our discussion will be on the fluctuating hydrodynamic description used to study the behaviour of a system of passive systems and the active matter of self-propelled particles. The dynamics are primarily formulated in terms of a set of collective modes of the system. Starting from a set of microscopic balance equations which are exact representations of the stochastic dynamics of a many particle system, the description with smooth Spatio-temporal dependencies follow.
We demonstrate how the appearance of the self-propelling terms and the breaking of Galilean invariances in the equations for the active-matter hydrodynamics are linked to the microscopic dynamics of the individual units.