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Heat fluctuations and coherences in a quantum heat engine

Rahav, Saar and Harbola, Upendra and Mukamel, Shaul (2012) Heat fluctuations and coherences in a quantum heat engine. In: PHYSICAL REVIEW A, 86 (4).

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Official URL: http://dx.doi.org/10.1103/PhysRevA.86.043843


Quantum coherence can affect the thermodynamics of small quantum systems. Coherences have been shown to affect the power generated by a quantum heat engine (QHE) which is coupled to two thermal photon reservoirs and to an additional cavity mode. We show that the fluctuations of the heat exchanged between the QHE and the reservoirs strongly depend on quantum coherence, especially when the engine operates as a refrigerator, i.e., heat current flows from the cold bath to the hot bath. Intriguingly, we find that the ratio of positive and negative (with respect to the thermodynamic force) fluctuations in the heat current satisfies a universal coherence-independent fluctuation theorem.

Item Type: Journal Article
Publisher: American Physical Society
Additional Information: Copyright for this article belongs to American Physical Society, USA
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 31 Dec 2012 06:06
Last Modified: 31 Dec 2012 06:06
URI: http://eprints.iisc.ac.in/id/eprint/45484

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