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arXiv · 2205.03823

Quantum battery based on superabsorption

Yudai Ueki·Shunsuke Kamimura·Yuichiro Matsuzaki·Kyo Yoshida·Yasuhiro Tokura
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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.

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Yudai Ueki, Shunsuke Kamimura, Yuichiro Matsuzaki, Kyo Yoshida, Yasuhiro Tokura. 2022-05-08. Quantum battery based on superabsorption. https://doi.org/10.7566/jpsj.91.124002

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