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  • 1902.09378

    Rights statement: © 2019 American Physical Society

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Efficiency of a cyclic quantum heat engine with finite-size baths

Research output: Contribution to journalJournal article

Published
Article number012122
<mark>Journal publication date</mark>16/07/2019
<mark>Journal</mark>Physical Review E
Issue number1
Volume100
Number of pages12
Publication statusPublished
Original languageEnglish

Abstract

In this paper we investigate the relationship between the efficiency of a cyclic quantum heat engine with the Hilbert space dimension of the thermal baths. By means of a general inequality, we show that the Carnot efficiency can be obtained only when both the hot and cold baths are infinitely large. By further introducing a specific model where the baths are constituted of ensembles of finite-dimensional particles, we further demonstrate the relationship between the engine's power and efficiency, with the dimension of the working substance and the bath particles.

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© 2019 American Physical Society