Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 43: Stochastic thermodynamics and information processing

DY 43.6: Vortrag

Mittwoch, 14. März 2018, 11:15–11:30, BH-N 243

Stochastic thermodynamics of periodically driven systems: Fluctuation theorem for currents and unification of two classes — •Somrita Ray and Andre Barato — Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden

Periodic driving is used to operate machines that go from standard macroscopic engines to small nonequilibrium microsized systems. Two classes of such systems are small heat engines driven by periodic temperature variations, and molecular pumps driven by external stimuli. Well-known results that are valid for nonequilibrium steady states of systems driven by fixed thermodynamic forces have been generalized to heat engines operated by external periodic drive only recently [1]. These results include a general expression for entropy production in terms of currents and affinities, and symmetry relations for the Onsager coefficients from linear-response theory. For nonequilibrium steady states, the Onsager reciprocity relations can be obtained from the more general fluctuation theorem for the currents. We present a fluctuation theorem for the currents for periodically driven systems [2] that implies a fluctuation dissipation relation, symmetry relations for Onsager coefficients, and further relations for nonlinear response coefficients. Our results are valid for both heat engines and molecular pumps.

1. K. Brandner, K. Saito and U. Seifert, Phys. Rev. X 5, 031019 (2015) 2. SR and A. C. Barato, Phys. Rev. E 96, 052120 (2017)