Quantum battery of interacting spins with environmental noise
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.
Keywords
Cite
@article{arxiv.2012.06187,
title = {Quantum battery of interacting spins with environmental noise},
author = {Fang Zhao and Fu-Quan Dou and Qing Zhao},
journal= {arXiv preprint arXiv:2012.06187},
year = {2021}
}