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SUMMARY:Brownian particles in nonequilibrium baths  - Clemens Bechinger (U
 niversitaet Konstanz)
DTSTART:20240220T130000Z
DTEND:20240220T140000Z
UID:TALK209746@talks.cam.ac.uk
CONTACT:Sarah Loos
DESCRIPTION:The power of thermodynamics comes at the expense of certain as
 sumptions and idealizations. An important premise is the concept of ​​
 a thermal bath which is coupled to the system under study. Typically\, suc
 h baths are idealized as an infinite reservoir of heat that remain in equi
 librium regardless of whether the system is in equilibrium or not. This\, 
 however\, is only valid when the relaxation time of the bath is much faste
 r than typical time scales of the system. Otherwise\, a driven system will
  excite the bath out of equilibrium and in turn interact with nonequilibri
 um fluctuations. Experiments with externally driven or self-propelled coll
 oidal particles suspended in viscoelastic baths\, whose relaxation times a
 re on the orders of seconds\, have revealed astonishing and – compared t
 o viscous fluids – qualitatively novel behaviors which are attributed to
  the nonequilibrium properties of the bath. In my talk\, I will discuss re
 cent experimental findings including particle oscillations within moving o
 ptical 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. 
LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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