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SUMMARY:Memory may hide dissipation in active baths - Ivan Di terlizzi (Ma
 x-Planck-Institut für Physik komplexer Systeme\, Dresden)
DTSTART:20231106T150000Z
DTEND:20231106T153000Z
UID:TALK203944@talks.cam.ac.uk
DESCRIPTION:The dynamics of a probe particle is highly influenced by the n
 ature of the bath in which it is immersed. In particular\, baths composed 
 by active (e.g.\, self-propelled) particles induce intriguing out-of-equil
 ibrium effects on tracer's motion that are customarily described by integr
 ating out the dynamics of the bath's degrees of freedom (DOFs). However\, 
 thermodynamic quantities\, such as the entropy production rate\, are gener
 ally severely affected by coarse-graining procedures. Here\, we show that 
 active baths are associated with the presence of dissipative DOFs exhibiti
 ng non-reciprocal interactions with a probe particle. Surprisingly\, integ
 rating out these DOFs inevitably results into a system-dependent increase 
 or reduction of the entropy production rate. On the contrary\, it stays in
 variant after integrating out non-dissipative DOFs. As a consequence\, the
 y determine the dimensionality of isoentropic hypersurfaces in the paramet
 er space. Our results are an attempt to shed light on the nature of active
  baths\, showing that the presence of a typical correlation time-scale is 
 not a sufficient condition to have non-equilibrium effects on a probe part
 icle\, and draws a path toward the understanding of thermodynamically cons
 istent procedures to derive effective dynamics of observed DOFs.
LOCATION:Seminar Room 1\, Newton Institute
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