Berlin 2015 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 56: Poster - Statistical Physics

DY 56.14: Poster

Donnerstag, 19. März 2015, 16:00–18:00, Poster A

Fluctuating efficiency for a microscopic Carnot engine — •Johannes Hoppenau — Carl-von-Ossietzky Universität Oldenburg, 26111 Oldenburg, Germany

Recently the probability density function of the efficiency of microscopic heat engines gained particular interest. In [1,2] G. Verley et al. analyze the distribution of efficiencies by using large deviation techniques. We propose a simple model of a microscopic Carnot engine to illustrate their results. In addition, we analyze the efficiency distribution in the limiting case of slow driving. Even in this case we find strong fluctuations of work and heat not compatible with a normal distribution of these quantities.

[1] G. Verley, M. Esposito, T. Willaert, and C. Van den Broeck, Nat. Commun. 5, 4721 (2014).

[2] G. Verley, T. Willaert, C. Van den Broeck, and M. Esposito, Phys. Rev. E 90, 052145 (2014).