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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Brunelli, M. [1] ; Fusco, L. [2] ; Landig, R. [3, 4] ; Wieczorek, W. [5] ; Hoelscher-Obermaier, J. [6, 7] ; Landi, C. [8] ; Semiao, F. L. [9] ; Ferraro, A. [2] ; Kiesel, N. [6] ; Donner, T. [4] ; De Chiara, G. [2] ; Paternostro, M. [2]
Total Authors: 12
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE - England
[2] Queens Univ Belfast, Sch Math & Phys, Ctr Theoret Atom Mol & Opt Phys, Belfast BT7 1NN, Antrim - North Ireland
[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 - USA
[4] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich - Switzerland
[5] Chalmers Univ Technol, Dept Microtechnol & Nanosci, S-41296 Gothenburg - Sweden
[6] Univ Vienna, Fac Phys, Vienna Ctr Quantum Sci & Technol VCQ, Boltzmanngasse 5, A-1090 Vienna - Austria
[7] Leibniz Univ Hannover, Inst Gravitat Phys, Albert Einstein Inst, Callinstr 38, D-30167 Hannover - Germany
[8] Univ Sao Paulo, Inst Fis, BR-05314970 Sao Paulo - Brazil
[9] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Sao Paulo - Brazil
Total Affiliations: 9
Document type: Journal article
Source: Physical Review Letters; v. 121, n. 16 OCT 17 2018.
Web of Science Citations: 17

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. (AU)

FAPESP's process: 14/01218-2 - Stochastic processes applied to out-of-equilibrium systems
Grantee:Gabriel Teixeira Landi
Support type: Regular Research Grants