https://doi.org/10.1140/epjp/s13360-023-04516-x
Regular Article
Quantum Stirling heat engine in two-coupled-qubit Heisenberg XYZ model
1
Department of Physics, College of Sciences, Yasouj University, 75918, Yasouj, Iran
2
Department of Physics, College of Sciences, Jahrom University, 74135‑111, Jahrom, Iran
Received:
27
March
2023
Accepted:
24
September
2023
Published online:
29
September
2023
In this work, a quantum Stirling machine as a heat engine or a refrigerator is investigated. The working substance of the machine is considered a two-qubit Heisenberg XYZ model under a magnetic field and the Dzyaloshinskii–Moriya interaction (DMI). We investigate the effects of magnetic field and the temperature of hot and cold baths on the absorbed heat, released heat, work done, efficiency, and performance coefficient of the Stirling heat engine and the Stirling refrigerator. It is deduced that with proper selection of the system parameters, the Stirling cycle can be operated as a heat engine or refrigerator with sufficient efficiency and performance coefficient. With rising the temperature of the hot bath and choosing proper values for other system parameters, the performance coefficient reaches the Carnot refrigerator. The heat engine efficiency can be increased by reducing the magnetic field.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
