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DY: Fachverband Dynamik und Statistische Physik

DY 23: Stochastic Thermodynamics

DY 23.4: Vortrag

Dienstag, 2. April 2019, 14:45–15:00, H20

Hidden degrees of freedom and fluctuation theorems: An analytically solvable model — •Jannik Ehrich and Marcel Kahlen — Institut für Physik, Carl von Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany

In some situations in stochastic thermodynamics not all relevant slow degrees of freedom are accessible. Consequently, one adopts an effective description involving only the visible parts of the system. This gives rise to an apparent entropy production that violates standard fluctuation theorems. We present an analytically solvable model illustrating how the fluctuation theorems are modified. Furthermore, we define an alternative to the apparent entropy production: the marginal entropy production which fulfills the fluctuation theorems in the usual form. We show that the non-Markovianity of the visible process is responsible for the deviations in the fluctuation theorems.

[1] M. Kahlen and J. Ehrich, J. Stat. Mech. (2018) 063204