Revealing the Work Cost of Generalized Thermal Baths

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 invest...

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Main Author:	Alexandre Roulet
Format:	Article
Language:	English
Published:	MDPI AG 2018-12-01
Series:	Entropy
Subjects:	quantum thermodynamics work cost energy management
Online Access:	https://www.mdpi.com/1099-4300/20/12/973

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spelling	doaj-7b57aaa98ab64dc8ac756db4d175d90f2020-11-25T00:21:32ZengMDPI AGEntropy1099-43002018-12-01201297310.3390/e20120973e20120973Revealing the Work Cost of Generalized Thermal BathsAlexandre Roulet0Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, SwitzerlandWe 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.https://www.mdpi.com/1099-4300/20/12/973quantum thermodynamicswork costenergy management
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Alexandre Roulet
spellingShingle	Alexandre Roulet Revealing the Work Cost of Generalized Thermal Baths Entropy quantum thermodynamics work cost energy management
author_facet	Alexandre Roulet
author_sort	Alexandre Roulet
title	Revealing the Work Cost of Generalized Thermal Baths
title_short	Revealing the Work Cost of Generalized Thermal Baths
title_full	Revealing the Work Cost of Generalized Thermal Baths
title_fullStr	Revealing the Work Cost of Generalized Thermal Baths
title_full_unstemmed	Revealing the Work Cost of Generalized Thermal Baths
title_sort	revealing the work cost of generalized thermal baths
publisher	MDPI AG
series	Entropy
issn	1099-4300
publishDate	2018-12-01
description	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.
topic	quantum thermodynamics work cost energy management
url	https://www.mdpi.com/1099-4300/20/12/973
work_keys_str_mv	AT alexandreroulet revealingtheworkcostofgeneralizedthermalbaths
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Revealing the Work Cost of Generalized Thermal Baths

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