Experimental Determination of Irreversible Entropy Production in out-of-Equilibrium Mesoscopic Quantum Systems.

Autor:	Brunelli M; Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom., Fusco L; Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom., Landig R; Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland., Wieczorek W; Department of Microtechnology and Nanoscience, Chalmers University of Technology, 412 96 Göteborg, Sweden., Hoelscher-Obermaier J; University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology (VCQ), Boltzmanngasse 5, 1090 Vienna, Austria.; Leibniz University Hannover, Institute for Gravitational Physics (Albert-Einstein-Institute), Callinstraße 38, 30167 Hannover, Germany., Landi G; Instituto de Física da Universidade de São Paulo, 05314-970 São Paulo, Brazil., Semião FL; Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170 Santo André, São Paulo, Brazil., Ferraro A; Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom., Kiesel N; University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology (VCQ), Boltzmanngasse 5, 1090 Vienna, Austria., Donner T; Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland., De Chiara G; Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom., Paternostro M; Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2018 Oct 19; Vol. 121 (16), pp. 160604.
DOI:	10.1103/PhysRevLett.121.160604
Abstrakt:	By making use of a recently proposed framework for the inference of thermodynamic irreversibility in bosonic quantum systems, we experimentally measure and characterize the entropy production rates in the nonequilibrium steady state of two different physical systems-a micromechanical resonator and a Bose-Einstein condensate-each coupled to a high finesse cavity and hence also subject to optical loss. Key features of our setups, such as the cooling of the mechanical resonator and signatures of a structural quantum phase transition in the condensate, are reflected in the entropy production rates. Our work demonstrates the possibility to explore irreversibility in driven mesoscopic quantum systems and paves the way to a systematic experimental assessment of entropy production beyond the microscopic limit.
Databáze:	MEDLINE
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