Journal Article

Lossy Micromaser Battery: Almost Pure States in the Jaynes–Cummings Regime

Shaghaghi, Vahid, Benenti, Giuliano, Singh, Varinder, Carrega, Matteo, Rosa, Dario

2023

Overview

We consider a micromaser model of a quantum battery, where the battery is a single mode of the electromagnetic field in a cavity, charged via repeated interactions with a stream of qubits, all prepared in the same non-equilibrium state, either incoherent or coherent, with the matter–field interaction modeled by the Jaynes–Cummings model. We show that the coherent protocol is superior to the incoherent one, in that an effective pure steady state is achieved for generic values of the model parameters. Finally, we supplement the above collision model with cavity losses, described by a Lindblad master equation. We show that battery performances, in terms of stored energy, charging power, and steady-state purity, are slightly degraded up to moderated dissipation rate. Our results show that micromasers are robust and reliable quantum batteries, thus making them a promising model for experimental implementations.

• Publisher: MDPI AG,MDPI
• Subject: Atomic properties / Batteries / Charging / Design and construction / Electromagnetic fields / Energy / Energy dissipation / ergotropy / Internal energy / Masers / Protocol / quantum energy storage / quantum thermodynamics / Qubits (quantum computing) / Steady state / steady states