Abstract
We investigate the quantum thermodynamic cycle of a quantum heat engine carrying out an Otto thermodynamic cycle. We use the thermal properties of a moving heat bath with relativistic velocity with respect to the cold bath. As a working medium, we use a two-level system and a harmonic oscillator that interact with a hot and cold bath respectively. In the current work, the quantum heat engine is studied in the high and low temperatures regime. Using quantum thermodynamics and the theory of open quantum systems we obtain the total produced work, the efficiency and the efficiency at maximum power. The maximum efficiency of the Otto quantum heat engine depends only on the ratio of the minimum and maximum energy gaps. On the contrary, the efficiency at maximum power and the extracted work decreases with the velocity since the motion of the heat bath has an energy cost for the quantum heat engine. Furthermore, the efficiency at maximum power depends on the nature of the working medium.
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Acknowledgments
I would like to thank my supervisor Charis Anastopoulos for his stimulating and fruitful discussions and suggestions that help me to complete this work. I would also like to thank Georgios Katsoulis for his valuable comments.
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Papadatos, N. The Quantum Otto Heat Engine with a Relativistically Moving Thermal Bath. Int J Theor Phys 60, 4210–4223 (2021). https://doi.org/10.1007/s10773-021-04969-9
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DOI: https://doi.org/10.1007/s10773-021-04969-9