CMSP Seminar (Joint ICTP/SISSA Statistical Physics) Tuesday 19 May
cm at ictp.it
Fri May 15 12:39:03 CEST 2020
(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
Brownian motion is a paradigmatic stochastic process, and well studied
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.
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