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arXiv · 2408.14373

A Single-Ion Information Engine for Charging Quantum Battery

Jialiang Zhang·Pengfei Wang·Wentao Chen·Zhengyang Cai·Mu Qiao·Riling Li·Yingye Huang·Haonan Tian·Henchao Tu·Kaifeng Cui·Leilei Yan·Junhua Zhang·Jingning Zhang·Manhong Yung·Kihwan Kim
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Abstract

Information engines produce mechanical work through measurement and adaptive control. For information engines, the principal challenge lies in how to store the generated work for subsequent utilization. Here, we report an experimental demonstration where quantized mechanical motion serves as a quantum battery and gets charged in repeated cycles by a single trapped-ion information engine. This is enabled by a key technological advancement in rapid state discrimination, allowing us to suppress measurement-induced disturbances. Consequently, we were able to obtain a charging efficiency over 50\% of the theoretical limit at the optimal temperature. The experimental results substantiate that this approach can render trapped ions a promising platform for microscopic information engines with potential applications in the future upon scaling up.

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Jialiang Zhang, Pengfei Wang, Wentao Chen, Zhengyang Cai, Mu Qiao, Riling Li, Yingye Huang, Haonan Tian, Henchao Tu, Kaifeng Cui, Leilei Yan, Junhua Zhang, Jingning Zhang, Manhong Yung, Kihwan Kim. 2024-08-26. A Single-Ion Information Engine for Charging Quantum Battery. https://doi.org/10.1103/g45c-ssfx

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