Brownian particles in nonequilibrium baths

Add to your list(s) Download to your calendar using vCal

• Clemens Bechinger (Universitaet Konstanz)
• Tuesday 20 February 2024, 13:00-14:00
• Center for Mathematical Sciences, Lecture room MR4.

If you have a question about this talk, please contact Sarah Loos.

The power of thermodynamics comes at the expense of certain assumptions and idealizations. An important premise is the concept of ​​a thermal bath which is coupled to the system under study. Typically, such baths are idealized as an infinite reservoir of heat that remain in equilibrium regardless of whether the system is in equilibrium or not. This, however, is only valid when the relaxation time of the bath is much faster than typical time scales of the system. Otherwise, a driven system will excite the bath out of equilibrium and in turn interact with nonequilibrium fluctuations. Experiments with externally driven or self-propelled colloidal particles suspended in viscoelastic baths, whose relaxation times are on the orders of seconds, have revealed astonishing and – compared to viscous fluids – qualitatively novel behaviors which are attributed to the nonequilibrium properties of the bath. In my talk, I will discuss recent experimental findings including particle oscillations within moving optical traps, a fastened hopping dynamics across potential barriers, the strongly enhanced rotational diffusion of self-propelled particles, but also the occurrence of memory-induced Magnus forces.

This talk is part of the DAMTP Statistical Physics and Soft Matter Seminar series.

This talk is included in these lists:

• All CMS events
• Center for Mathematical Sciences, Lecture room MR4
• DAMTP Statistical Physics and Soft Matter Seminar
• Soft Matter
• bld31

Note that ex-directory lists are not shown.