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 Θ(N−1/2) by applying a conventional scheme, we can achieve a charging time Θ(N−1) in our scheme. Our results open the path to ultra-fast charging of a quantum battery.
@article{arxiv.2205.03823,
title = {Quantum battery based on superabsorption},
author = {Yudai Ueki and Shunsuke Kamimura and Yuichiro Matsuzaki and Kyo Yoshida and Yasuhiro Tokura},
journal= {arXiv preprint arXiv:2205.03823},
year = {2022}
}