Fast charging of a quantum battery assisted by noise

Srijon Ghosh, Titas Chanda, Shiladitya Mal, and Aditi Sen(De)
Phys. Rev. A 104, 032207 – Published 9 September 2021

Abstract

We investigate the performance of a quantum battery exposed to local Markovian and non-Markovian dephasing noises. The battery is initially prepared as the ground state of a one-dimensional transverse XY model with open boundary condition and is charged (discharged) via interactions with local bosonic reservoirs. We show that in the transient regime, the quantum battery (QB) can store energy faster and has a higher maximum extractable work, quantified via ergotropy, when it is affected by local phase-flip or bit-flip Markovian noise compared to the case when there is no noise in the system. In both the charging and discharging processes, we report the enhancement in work output as well as in ergotropy when all the spins are affected by a non-Markovian Ohmic bath in both the transient and the steady-state regimes, thereby showing a counterintuitive advantage of decoherence in the QB. In both Markovian and non-Markovian cases, we identify the system parameters and the corresponding noise models which lead to maximum enhancement of work output and ergotropy. Moreover, we show that the benefit due to noise persists even with the initial state being prepared at a moderate temperature.

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  • Received 3 August 2021
  • Accepted 23 August 2021

DOI:https://doi.org/10.1103/PhysRevA.104.032207

©2021 American Physical Society

Physics Subject Headings (PhySH)

Statistical Physics & ThermodynamicsQuantum Information, Science & Technology

Authors & Affiliations

Srijon Ghosh1, Titas Chanda2, Shiladitya Mal1, and Aditi Sen(De)1

  • 1Harish-Chandra Research Institute and HBNI, Chhatnag Road, Jhunsi, Allahabad 211019, India
  • 2Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński, Łojasiewicza 11, 30-348 Kraków, Poland

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Issue

Vol. 104, Iss. 3 — September 2021

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