Regensburg 2022 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Stochastic Thermodynamics and Information Processing

DY 24.4: Vortrag

Mittwoch, 7. September 2022, 10:30–10:45, H19

Phase shift in periodically driven non-equilibrium systems: Its identification and a bound — •Julius Degünther, Timur Koyuk, and Udo Seifert — II. Institut für Theoretische Physik, Universität Stuttgart, 70550 Stuttgart, Germany

Time-dependently driven stochastic systems form a vast and manifold class of non-equilibrium systems used to model important applications on small length scales such as bit erasure protocols or microscopic heat engines. One property that unites all these quite different systems is some form of lag between the driving of the system and its response. For periodic steady states, we quantify this lag by introducing a generalized phase difference. We prove two tight bounds for this generalized phase difference, which provide upper limits to the lag such systems can yield. The first and most general bound depends only on the relative speed of the driving. The second more detailed bound takes additional information about the rates into account. We show that both bounds can be saturated by an appropriate choice of parameters.