Chinese Journal of Quantum Electronics, Volume. 40, Issue 4, 582(2023)

Effects of coherence on storage energy of quantum battery in non⁃equilibrium environment

YU Wenli1... ZHANG Yun2 and LI Hai2,* |Show fewer author(s)
Author Affiliations
  • 1School of Computer Science and Technology, Shandong Technology and Business University, Yantai 264005, China
  • 2School of Information and Electronic Engineering, Shandong Technology and Business University, Yantai 264005, China
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    Quantum battery is a kind of quantum devices of storage energy, which has wide potential applications in many quantum small systems, such as quantum sensors, molecular motors and so on. Based on the framework of collision model, the effects of coherence of non-equilibrium environment on the storage energy of quantum battery have been studied when the battery is being charged in a non-equilibrium coherent environment. By deriving the quantum master equation describing the dynamics of system, the analytical expression for storage energy of quantum battery at steady state is given, and then the effects of squeezing coherence and heat-exchange coherence on the storage energy of quantum battery are discussed. It demonstrates that the squeezing coherence of auxiliary unit has no contribution to the storage energy of battery, but the heat-exchange coherence (including coherence magnitude and relative phase) can improve the storage energy of battery efficiently, and can be regarded as a kind of useful "fuel" resource for battery.

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    Wenli YU, Yun ZHANG, Hai LI. Effects of coherence on storage energy of quantum battery in non⁃equilibrium environment[J]. Chinese Journal of Quantum Electronics, 2023, 40(4): 582

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    Paper Information

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    Received: May. 6, 2021

    Accepted: --

    Published Online: Aug. 22, 2023

    The Author Email: LI Hai (shenghuo2003@126.com)

    DOI:10.3969/j.issn.1007-5461.2023.04.017

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