CMSP Seminar (Joint ICTP/SISSA Statistical Physics) Tuesday 19 May

[ICTP/CM]

CMSP Seminar
(Joint ICTP/SISSA Statistical Physics)

When: Tuesday 19 May at 11 a.m.
Where: Join Zoom Meeting ID 799-099-444

Speaker: Matthias Krüger (Georg-August-Universität Göttingen)

Title: Brownian Motion in a Non-equilibrium Bath: Theory and Experiment

Abstract: http://indico.ictp.it/event/9338/ 
<http://indico.ictp.it/event/9338/>
Brownian motion is a paradigmatic stochastic process, and well studied 
both theoretically
as well as experimentally. A natural occurance of Brownian motion is 
found for micron sized
particles immersed in simple, Newtonian fluids. The motion of this 
particle is then a (nearly)
perfect random walk, and obeys a linear (Markovian) stochastic equation. 
This is not true if
the particle is suspended in a viscoelastic fluid, which is 
characterized by long relaxation times
and pronounced nonlinear properties. The latter case if thus a good 
model system for nonlinear
stochastic processes, and studying it is challenging, both theoretically 
as well experimentally.
For example, driving the particle drives the viscoelastic fluid out of 
equilibrium, so that Brownian
motion in a non-equilibrium bath is obtained. We will discuss recent 
theoretical and experimental
progress regarding this scenario.