Enhancing the Charging Performance of Many-Body Quantum Batteries through Landau-Zener Driving

TL;DR

This paper investigates how Landau-Zener driving improves the charging efficiency of many-body quantum batteries modeled as spin chains, highlighting the benefits of long-range interactions and parameter optimization.

Contribution

It introduces a Landau-Zener driving protocol for many-body quantum batteries and demonstrates its advantages over periodic driving, especially with long-range interactions.

Findings

Landau-Zener driving yields higher energy storage efficiency than periodic driving.

Long-range interactions enhance the performance of the quantum battery.

Optimizing parameters like anisotropy and interaction strength significantly improves efficiency.

Abstract

We explore the charging advantages of a many-body quantum battery driven by a Landau-Zener field. Such a system may be modeled as a Heisenberg XY spin chain with $\textit{N}$ interacting spin-$\frac{1}{2}$ particles under an external magnetic field. Here we consider both nearest-neighbor and long-range spin interactions. The charging performance of this many-body quantum battery is evaluated by comparing Landau-Zener and periodic driving protocols within these interaction regimes. Our findings show that the Landau-Zener driving can offer superior energy deposition and storage efficiency compared to periodic driving. Notably, the Landau-Zener protocol may deliver optimal performance when combined with long-range interactions. The efficiency of a Landau-Zener quantum battery can be significantly enhanced by optimizing key parameters, such as XY anisotropy, the magnitude of the driving field, and interaction strength.