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Unified trade-off optimization of quantum Otto heat engines with squeezed thermal reservoirs

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Abstract

We consider a quantum Otto heat engine cycle operating between two squeezed thermal reservoirs that are characterized by a temperature as well as additional parameters that quantify the degree of squeezing. The optimal efficiency at the unified trade-off optimization criterion representing a compromise between energy benefits and losses for a quantum Otto heat engine is systematically investigated. The analytical expressions for the optimal efficiency are determined in the limit adiabatic and nonadiabatic processes as well as in the high- and low-temperature regimes, respectively. The general unified trade-off efficiency is given as a nonequilibrium efficiency that extends the standard unified trade-off efficiency to a more general nonequilibrium condition.

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Acknowledgements

This paper is supported by the National Natural Science Foundation of China (Nos. 11675132 and 11947010), the Science and Technology Base and Talent Project of Guangxi (No. AD19110104), and the Guangxi University of Science and Technology Foundation for PhDs (No. 18Z11).

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Authors and Affiliations

  1. School of Science, Guangxi University of Science and Technology, Liuzhou, 545006, People’s Republic of China

    Yanchao Zhang

  2. College of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, People’s Republic of China

    Juncheng Guo

  3. Department of Physics, Xiamen University, Xiamen, 361005, People’s Republic of China

    Jincan Chen

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  1. Yanchao Zhang
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  2. Juncheng Guo
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  3. Jincan Chen
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Correspondence to Yanchao Zhang.

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Zhang, Y., Guo, J. & Chen, J. Unified trade-off optimization of quantum Otto heat engines with squeezed thermal reservoirs. Quantum Inf Process 19, 268 (2020). https://doi.org/10.1007/s11128-020-02774-7

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