Tunable Dynamics of a Dipolar Quantum Battery: Role of Spin-Spin Interactions and Coherence

TL;DR

This paper investigates how spin-spin interactions and quantum coherence influence the energy storage and power output of a dipolar quantum battery, highlighting the potential for optimized quantum energy storage devices.

Contribution

It introduces a detailed analysis of a dipolar spin system with Dzyaloshinskii-Moriya interaction, revealing how external parameters and quantum resources enhance battery performance.

Findings

Quantum coherence boosts energy storage efficiency.

Dzyaloshinskii-Moriya interaction increases power output.

Dephasing environment limits long-term work extraction.

Abstract

This study explores the energy storage dynamics of a quantum battery (QB) modeled using a dipolar spin system with Dzyaloshinskii-Moriya (DM) interaction. We examine the performance of this system in terms of ergotropy, instantaneous power, capacity, and quantum coherence using a two-qubit model. By solving the system's time evolution under cyclic unitary processes, we analyze how external parameters such as temperature, magnetic field, and DM interaction influence the charging behavior and quantum resources of the battery. The findings demonstrate that quantum coherence and DM interaction significantly enhance the energy storage efficiency and power output of the quantum battery, offering promising strategies for designing high-performance quantum energy storage devices. Furthermore, we investigate the performance of quantum battery under the influence of a common dephasing environment, which limits the long-term work-extraction capability of dipolar quantum batteries.