Related papers: Quantum battery of interacting spins with environmental noise

Quantum battery of interacting spins with environmental noise

URL: http://arxiv.org/abs/2012.06187v1
Date: Fri, 11 Dec 2020 08:24:40 GMT
Title: Quantum battery of interacting spins with environmental noise
Authors: Fang Zhao, Fu-Quan Dou, Qing Zhao
Abstract summary: We constructed the quantum battery model of an N-spin chain with nearest-neighbor hopping interaction. We obtained the maximum energy in the quantum battery charged by a coherent cavity driving field or a thermal heat bath.
Score: 10.506029420934741
License: http://creativecommons.org/licenses/by/4.0/
Abstract: A quantum battery is a temporary energy-storage system. We constructed the quantum battery model of an N-spin chain with nearest-neighbor hopping interaction and investigated the charging process of the quantum battery. We obtained the maximum energy in the quantum battery charged by a coherent cavity driving field or a thermal heat bath. We confirmed that for a finite-length spin chain, thermal charging results in a nonzero ergotropy, contradicting a previous result: that an incoherent heat source cannot charge a single-spin quantum battery. The nearest-neighbor hopping interaction induces energy band splitting, which enhances the energy storage and the ergotropy of the quantum battery. We found a critical point in the energy and ergotropy resulting from the ground-state quantum phase transition, after which the energy significantly enhance. Finally, we also found that disorder increased the energy of the quantum battery.

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