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Quantum Thermodynamics

Power enhancement of heat engines via correlated thermalization in multilevel systems

arXiv
Authors: David Gelbwaser-Klimovsky, Wolfgang Niedenzu, Paul Brumer, Gershon Kurizki

Year

2014

Paper ID

46592

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

We analyze a heat machine based on a periodically-driven quantum system permanently coupled to hot and cold baths. It is shown that the maximal power output of a degenerate V-type three-level heat engine is that generated by two independent two-level systems. For N levels, this maximal enhancement is (N-1)-fold. Hence, level degeneracy is a thermodynamic resource that may effectively boost the power output. The efficiency, however, is not affected. We find that coherence is not an essential asset in multilevel-based heat machines. The existence of multiple thermalization pathways sharing a common ground state suffices for power enhancement.

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  • This paper contributes to the Quantum Thermodynamics research area in the Quantum Articles archive.
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  • We analyze a heat machine based on a periodically-driven quantum system permanently coupled to hot and cold baths.

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