https://doi.org/10.1140/epjb/s10051-024-00721-4
Regular Article - Statistical and Nonlinear Physics
Quantum critical engine at finite temperatures
1
Raman Research Institute, 560080, Bengaluru, Karnataka, India
2
Department of Physical Sciences, Indian Institute of Science Education and Research Berhampur, 760010, Berhampur, Odisha, India
3
Department of Physics, Indian Institute of Technology Palakkad, 678623, Palakkad, Kerala, India
Received:
4
April
2024
Accepted:
4
June
2024
Published online:
18
June
2024
We construct a quantum critical Otto engine that is powered by finite temperature baths. We show that the work output of the engine shows universal power law behavior that depends on the critical exponents of the working medium, as well as on the temperature of the cold bath. Furthermore, higher temperatures of the cold bath allows the engine to approach the limit of adiabatic operation for smaller values of the time period, while the corresponding power shows a maximum at an intermediate value of the cold bath temperature. These counterintuitive results stems from thermal excitations dominating the dynamics at higher temperatures.
Copyright comment 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.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. 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.
