Collective enhancement in dissipative quantum batteries

TL;DR

This paper investigates how collective effects in a dissipative quantum battery composed of multiple qubits can enhance charging performance, with findings showing that increasing the number of qubits mitigates dissipation effects.

Contribution

It demonstrates that collective enhancements in quantum batteries persist despite dissipation and can be amplified by scaling up the system size.

Findings

Collective effects improve charging energy and power in dissipative quantum batteries.

Dissipation effects can be mitigated by increasing the number of qubits.

Performance deterioration due to losses can be reduced by scaling up the battery size.

Abstract

We study a quantum battery made out of $N$ non-mutually interacting qubits coupled to a dissipative single electromagnetic field mode in a resonator. We quantify the charging energy, ergotropy, transfer rate, and power of the system, showing that collective enhancements are still present despite of losses, and can even increase with dissipation. Moreover, we observe that a performance deterioration due to dissipation can be reduced by scaling up the battery size. This is useful for experimental realizations when controlling the quality of the resonator and the number of qubits are limiting factors.