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Steering Heat Engines: A Truly Quantum Maxwell Demon

Julkaisun tekijät: Beyer K, Luoma K, Strunz WT


Julkaisuvuosi: 2019

Journal: Physical Review Letters

Tietokannassa oleva lehden nimi: PHYSICAL REVIEW LETTERS

Lehden akronyymi: PHYS REV LETT

Volyymi: 123

Julkaisunumero: 25

Sivujen määrä: 6

ISSN: 0031-9007


We address the question of verifying the quantumness of thermal machines. A Szilard engine is truly quantum if its work output cannot be described by a local hidden state model, i.e., an objective local statistical ensemble. Quantumness in this scenario is revealed by a steering-type inequality which bounds the classically extractable work. A quantum Maxwell demon can violate that inequality by exploiting quantum correlations between the work medium and the thermal environment. While for a classical Szilard engine an objective description of the medium always exists, any such description can be ruled out by a steering task in a truly quantum case.

Last updated on 2022-04-03 at 12:43