Efficiency and thermodynamic uncertainty relations of a dynamical quantum heat engine

In the quest for high-performance quantum thermal machines, looking for an optimal thermodynamic efficiency is only part of the issue. Indeed, at the level of quantum devices, fluctuations become extremely relevant and need to be taken into account. In this paper we study the thermodynamic uncertain...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2024-07, Vol.233 (6), p.1263-1274
Main Authors: Razzoli, Luca, Cavaliere, Fabio, Carrega, Matteo, Sassetti, Maura, Benenti, Giuliano
Format: Article
Language:English
Subjects:
Atomic
Classical and Continuum Physics
Condensed Matter Physics
Dynamics of Complex Systems: Present and Future
Harmonic oscillators
Heat engines
Materials Science
Measurement Science and Instrumentation
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Regular Article
Thermal baths
Thermodynamic efficiency
Thermodynamics
Uncertainty
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Summary:In the quest for high-performance quantum thermal machines, looking for an optimal thermodynamic efficiency is only part of the issue. Indeed, at the level of quantum devices, fluctuations become extremely relevant and need to be taken into account. In this paper we study the thermodynamic uncertainty relations for a quantum thermal machine with a quantum harmonic oscillator as a working medium, connected to two thermal baths, one of which is dynamically coupled. We show that parameters can be found such that the machine operates both as a quantum engine or refrigerator, with both sizeable efficiency and small fluctuations.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjs/s11734-023-00949-8