CSCS Hybrid Seminar March 22, 2022 “The role of non-conservative interactions in non-equilibrium stochastic systems” – 11:30am PST

The role of non-conservative interactions innon-equilibrium stochastic systems

A Hybrid Complex Systems Seminar

The role of non-conservative interactions in
non-equilibrium stochastic systemsA Hybrid Complex Systems Seminar

Sarah Loos 
Abdus Salam International Centre for Theoretical Physics (ICTP)
Trieste, Italy

Tuesday, March 22, 2022
11:30AM EST
Weiser Hall Room 747
Password: CSCS (all caps)Link to full event listingHybrid Seminar
Password: CSCS (all caps)Abstract: The complex world surrounding us, including all living matter and various artificial complex systems, mostly operates far from thermal equilibrium. A major goal of modern statistical physics and thermodynamics is to unravel the fundamental principles that govern the individual dynamics and collective behavior of such nonequilibrium systems, like the swarming of fish or flocking of birds. A novel key concept to describe and classify nonequilibrium systems is the stochastic entropy production, which explicitly quantifies the breaking of time-reversal symmetry. However, so far, little attention has been paid to the implications of non-conservative interactions, such as time-delayed (i.e., retarded) or non-reciprocal interactions, which cannot be represented by Hamiltonians contrasting all interactions traditionally considered in statistical physics. Non-conservative interactions indeed emerge commonly in biological, chemical and feedback systems, and are widespread in engineering and machine learning. In this talk, I will use simple time- and space-continuous models to discuss technical challenges and unexpected physical phenomena induced by non-reciprocity [1,2] and time delay [3,4].

[1] Loos and Klapp, NJP 22, 123051 (2020)
[2] Loos, Hermann, and Klapp, Entropy 23, 696 (2021)
[3] Loos and Klapp, Sci. Rep. 9, 2491 (2019)
[4] Holubec, Geiss, Loos, Kroy, and Cichos, PRL 127, 258001 (2021) Coffee Talk! Join us early for coffee chat.  The meeting will open 15 minutes before the seminar start time. Feel free to join us. Microphones and video will be enabled so you can engage in conversation around the virtual coffee table! Once the seminar begins, microphones will be turned to mute, and you can choose to remain visible to the speaker (everyone likes an audience!) or to mute your video as the seminar begins.  Questions can be submitted in the chat.