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SUMMARY:Irreversibility and information flows in the presence of nonrecipr
 ocity and time delay - Sarah Loos\, ICTP
DTSTART:20211026T120000Z
DTEND:20211026T130000Z
UID:TALK163858@talks.cam.ac.uk
CONTACT:Camille Scalliet
DESCRIPTION:The field of stochastic thermodynamics has greatly advanced ou
 r understanding of the fundamental principles that govern living and artif
 icial nonequilibrium systems. A key concept is the stochastic entropy prod
 uction\, which explicitly quantifies the breaking of time-reversal symmetr
 y on the mesoscale. However\, so far\, little attention has been paid to t
 he thermodynamic implications of non-conservative interactions\, such as r
 etarded\, i.e.\, time-delayed and nonreciprocal interactions\, which canno
 t be represented by interaction Hamiltonians\, contrasting all interaction
 s traditionally considered in statistical mechanics and thermodynamics. Su
 ch interactions indeed emerge commonly in biological\, chemical and feedba
 ck systems\, and are widespread in active matter. In this talk\, I will us
 e simple time- and space-continuous Langevin models to discuss technical c
 hallenges and unexpected physical phenomena induced by nonreciprocity [1] 
 and time delay [2\,3]. For example\, when reversed in time\, the dependenc
 e of a delay process on its past transforms into a dependence on its own f
 uture\, entailing acausality\; which has nontrivial consequences for the t
 hermodynamic arrow of time. The total entropy production is then composed 
 not only of the usual contributions of heat release and Shannon entropy ch
 ange\, but also of an information-theoretic term. Likewise\, the entropy b
 alance of a system that is nonreciprocally coupled to another entity conta
 ins the information flow\, giving rise to a generalised second law [1]. We
  show that a sufficiently strong information flow can generate a heat curr
 ent against a temperature gradient. \n\n[1] Loos and Klapp\, NJP 22\, 1230
 51 (2020).\n\n[2] Loos and Klapp\, Sci. Rep. 9\, 2491 (2019).\n\n[3] Loos\
 , Hermann\, and Klapp\, Entropy 23\, 696 (2021).
LOCATION:Center for Mathematical Sciences\, Lecture room MR11\, or https:/
 /maths-cam-ac-uk.zoom.us/j/98016675669
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