Quantum battery based on superabsorption

TL;DR

This paper proposes a quantum battery design utilizing superabsorption, enabling significantly faster charging times through entanglement-enhanced coupling, advancing the potential for ultra-fast quantum energy storage.

Contribution

The paper introduces a novel quantum battery scheme that leverages superabsorption and entanglement to achieve faster charging times than conventional methods.

Findings

Charging time scales as Θ(N^{-1}) with the new scheme.

Coupling strength is enhanced due to entanglement.

Potential for ultra-fast quantum battery charging.

Abstract

A quantum battery is a device where an energy is charged by using a quantum effect. Here, we propose a quantum battery with a charger system composed of $N$ qubits by utilizing a collective effect called a superabsorption. Importantly, the coupling strength between the quantum battery and charger system can be enhanced due to an entanglement. While the charger time scales as $\Theta\left(N^{-1/2}\right)$ by applying a conventional scheme, we can achieve a charging time $\Theta\left(N^{-1}\right)$ in our scheme. Our results open the path to ultra-fast charging of a quantum battery.