Experimental Determination of Irreversible Entropy Production in out-of-Equilibrium Mesoscopic Quantum Systems
Artikel i vetenskaplig tidskrift, 2018

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.

Micromechanical resonators

Statistical mechanics

Quantum optics

Superconducting materials

Phase transitions

Bose-Einstein condensation


M. Brunelli

University of Cambridge

L. Fusco

Queen's University Belfast

R. Landig

Eidgenössische Technische Hochschule Zürich (ETH)

Harvard University

Witlef Wieczorek

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

J. Hoelscher-Obermaier

Leibniz Universität Hannover

Universität Wien

C. Landi

Universidade de Sao Paulo (USP)

F. L. Semiao

Universidade Federal do ABC

A. Ferraro

Queen's University Belfast

N. Kiesel

Universität Wien

T. Donner

Eidgenössische Technische Hochschule Zürich (ETH)

G. De Chiara

Queen's University Belfast

M. Paternostro

Queen's University Belfast

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 121 16 160604


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