Efficiency and thermodynamic uncertainty relations of a dynamical quantum heat engine
Center for Nonlinear and Complex Systems, Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100, Como, Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133, Milan, Italy
3 Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146, Genoa, Italy
4 CNR-SPIN, Via Dodecaneso 33, 16146, Genoa, Italy
5 NEST, Istituto Nanoscienze-CNR, Piazza S. Silvestro 12, 56127, Pisa, Italy
Accepted: 19 July 2023
Published online: 7 August 2023
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.
© The Author(s) 2023
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