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Open AccessArticle

Revealing the Work Cost of Generalized Thermal Baths

Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
Entropy 2018, 20(12), 973; https://doi.org/10.3390/e20120973
Received: 11 November 2018 / Revised: 1 December 2018 / Accepted: 12 December 2018 / Published: 15 December 2018
(This article belongs to the Special Issue Quantum Thermodynamics II)
We derive the work cost of using generalized thermal baths from the physical equivalence of quantum mechanics under unitary transformations. We demonstrate our method by considering a qubit extracting work from a single bath to amplify a cavity field. There, we find that only half of the work investment is converted into useful output, the rest being wasted as heat. These findings establish the method as a promising tool for studying quantum resources within the framework of classical thermodynamics. View Full-Text
Keywords: quantum thermodynamics; work cost; energy management quantum thermodynamics; work cost; energy management
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Roulet, A. Revealing the Work Cost of Generalized Thermal Baths. Entropy 2018, 20, 973.

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