Regensburg 2019 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 9: Dynamics in many-body systems: Equilibration and localization II (joint session DY/TT)

DY 9.6: Vortrag

Montag, 1. April 2019, 17:00–17:15, H19

Cooperative efficiency boost for quantum heat enginesDavid Gelbwaser-Klimovsky1, Wassilij Kopylov2, and •Gernot Schaller21Department of Chemistry and Chemical Biology, Harvard University, Cambridge, USA — 2Institut für Theoretische Physik, Technische Universität Berlin, D-10623 Berlin, Germany

The power and efficiency of many-body single-stroke heat engines can be boosted by performing cooperative non-adiabatic operations in contrast to the commonly used adiabatic implementations. The key property relies on the fact that non-adiabaticity allows for cooperative effects, that can use the thermodynamic resources only present in the collective non-passive state of a many-body system. In particular, we discuss an analytic formula for the efficiency of a quantum Otto cycle, which increases with the number of copies used and reaches a many-body bound, which we discuss analytically.

[1] D. Gelbwaser-Klimovsky, W.Kopylov, and G. Schaller, Cooperative efficiency boost for quantum heat engines, arXiv:1809.02564.

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