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DY: Fachverband Dynamik und Statistische Physik
DY 43: Stochastic thermodynamics and information processing
DY 43.9: Vortrag
Mittwoch, 14. März 2018, 12:15–12:30, BH-N 243
Records of entropy production in a double quantum dot — •Edgar Roldan1, Shilpi Singh2, Izaak Neri1, Ivan Khaymovich1, Dmitry Golubev2, Ville Maisi3, Joonas Peltonen2, Frank Jülicher1, and Jukka Pekola2 — 1Max Planck Institute for the Physics of Complex System (Dresden, Germany) — 2Low Temperature Laboratory, Aalto University (Aalto, Finland) — 3Lund University (Lund, Sweden)
Little is known about extreme-value statistics of thermodynamic fluxes characterising the most extreme deviations from the average behaviours. We report on the experimental measurement of stochastic entropy production and of records of negative entropy. For this purpose we employ a metallic double dot under a constant external DC bias which realizes Markovian nonequilibrium steady states. We find that the cumulative distribution of entropy production's negative record is bounded at all times by a limiting exponential distribution with a mean value equal to minus the Boltzmann constant. Using this result, we derive an upper bound for the average maximal entropy influx from the environment to a mesoscopic system in a finite time, and demonstrate this result with experimental data. Our work provides bounds for the maximal fluctuations of single-electronic currents against the direction of the electric field. Furthermore, our results may shed light on the statistics of overheating events in single-electronic devices which are key for the design of reversible computing nano-devices operating near Landauer's principle of minimal heat dissipation.