Analytically solvable many-body Rosen-Zener quantum battery

TL;DR

This paper derives analytical solutions for a Rosen-Zener quantum battery with atomic interactions and external driving, revealing conditions for full charging, energy fluctuations, and quantum phase transition effects.

Contribution

It provides the first analytical solutions for the energy, power, and entropy in a many-body Rosen-Zener quantum battery with interactions and external driving.

Findings

Full charging achieved under specific driving conditions

Maximum stored energy near quantum phase transition

Atomic interactions induce quantum phase transition effects

Abstract

Quantum batteries are energy storage devices that satisfy quantum mechanical principles. How to obtain analytical solutions for quantum battery systems and achieve a full charging is a crucial element of the quantum battery. Here, we investigate the Rosen-Zener Quantum batteries are energy storage devices that satisfy quantum mechanical principles. How to obtain analytical solutions for quantum battery systems and achieve a full charging is a crucial element of the quantum battery. Here, we investigate the Rosen-Zener quantum battery with $N$ two-level systems, which includes atomic interactions and external driving field. The analytical solutions of the stored energy, changing power, energy quantum fluctuations, and von Neumann entropy (diagonal entropy) are derived by employing the gauge transformation. We demonstrate that full charging process can be achieved when the external driving field strength and scanning period conforms to a quantitative relationship. The local maximum value of the final stored energy corresponds to the local minimum values of the final energy fluctuations and diagonal entropy. Moreover, we find that the atomic interaction induces the quantum phase transition and the maximum stored energy of the quantum battery reaches the maximum value near the quantum phase transition point. Our result provides an insightful theoretical scheme to realize the efficient quantum battery.