Enhancing self-discharging process with disordered quantum batteries.

Phys Rev E

Departamento de Física, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, 13565-905 São Carlos, SP, Brazil.

Published: May 2022

AI Article Synopsis

  • Quantum batteries, a key innovation in quantum technology, face performance limitations due to self-discharging caused by decoherence.
  • This research explores how introducing local field fluctuations (disorder) can counteract the negative impacts of decoherence, leading to improved battery performance through an "incoherent gain of ergotropy" process.
  • By optimizing the disorder strength and initial conditions, it's possible to increase stored ergotropy beyond its initial value, which also enhances the battery's half-life, paving the way for further studies into disorder and many-body effects in quantum batteries.

Article Abstract

One of the most important devices emerging from quantum technology are quantum batteries. However, self-discharging, the process of charge wasting of quantum batteries due to decoherence phenomenon, limits their performance, measured by the concept of ergotropy and half-life time of the quantum battery. The effects of local field fluctuation, introduced by the disorder term in the Hamiltonian of the system, on the performance of the quantum batteries is investigated in this paper. The results reveal that the disorder term could compensate disruptive effects of the decoherence, i.e., self-discharging, and hence improve the performance of the quantum battery via "incoherent gain of ergotropy" procedure. Adjusting the strength of the disorder parameter to a proper value and choosing a suitable initial state of the quantum battery, the amount of free ergotropy, defined with respect to the free Hamiltonian, could exceed the amount of initial stored ergotropy. In addition harnessing the degree of the disorder parameter could help to enhance the half-life time of the quantum battery. This study opens perspective to further investigation of the performance of quantum batteries that explore disorder and many-body effects.

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Source
http://dx.doi.org/10.1103/PhysRevE.105.054115DOI Listing

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