Dresden 2014 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 5: Focus Session: Feedback Control of Nonlinear Soft and Hard Matter Systems (joint session DY/CPP)

DY 5.1: Hauptvortrag

Montag, 31. März 2014, 15:00–15:30, HÜL 186

Feedback and information processing in stochastic thermodynamics — •Udo Seifert — II. Inst. für Theoretische Physik, Universität Stuttgart

Stochastic thermodynamics provides a framework for describing feedback control of colloidal and molecular systems [1]. A crucial concept is the notion of optimal finite-time protocols that transform a given initial distribution to a given final one in finite time with minimal thermodynamic cost [2]. If additional information becomes available through a measurement of the state of the system, one can thus even extract work from a single heat bath [3]. Fluctuation theorems taking into account this concept of information lead to bounds on the efficiency of such Brownian information machines [4]. These feedback-based schemes will be compared to autonomous information processing as it occurs in cellular sensing [5].

[1] U Seifert, Rep. Prog. Phys. 75, 126001, 2012

[2] T Schmiedl and U Seifert, Phys. Rev. Lett. 98, 108301, 2007

[3] M Bauer, D Abreu, and U Seifert, J. Phys. A 45, 162001, 2012

[4] D Abreu and U Seifert, Phys. Rev. Lett. 108, 030601, 2012

[5] AC Barato, D Hartich, and US, Phys. Rev. E 87, 042104, 2013