Stable collective charging of ultracold atoms quantum batteries

TL;DR

This paper introduces a new quantum battery model using ultracold atoms in a three-well system, demonstrating stable collective charging via a SAP protocol and revealing oscillatory behavior influenced by interactions.

Contribution

It presents a novel quantum battery design with a collective charging protocol using ultracold atoms and analyzes the effects of interactions on charging dynamics.

Findings

Collective charging causes oscillatory charge behavior with finite interactions.

The proposed protocol enables stable and controllable quantum batteries.

Ultracold atom platforms can realize the three-well system for quantum batteries.

Abstract

We propose a novel quantum battery realized with a few interacting particles in a three-well system with different on-site energies, which could be realized with ultracold atom platforms. We prepare the initial state in the lowest energy well and charge the battery using a Spatial Adiabatic Passage (SAP)-based protocol, enabling the population of a higher energy well. We examine the charging under varying interaction strengths and reveal that the consideration of collective charging results in an intriguing oscillatory behavior of the final charge for finite interactions, through diabatic evolution. Our findings open a new avenue for building stable and controllable quantum batteries.