Quantum Charging Advantage in Superconducting Solid-State Batteries

• URL: http://arxiv.org/abs/2602.08610v1
• Date: Mon, 09 Feb 2026 12:55:21 GMT
• Title: Quantum Charging Advantage in Superconducting Solid-State Batteries
• Authors: Chang-Kang Hu, Chilong Liu, Jingchao Zhao, Liuzhu Zhong, Yuxuan Zhou, Mingze Liu, Haolan Yuan, Yongchang Lin, Yue Xu, Guantian Hu, Guixu Xie, Zixing Liu, Ruiyang Zhou, Yougui Ri, Wenxuan Zhang, Ruicheng Deng, Andreia Saguia, Xiayu Linpeng, Marcelo S. Sarandy, Song Liu, Alan C. Santos, Dian Tan, Dapeng Yu,
• Abstract summary: We experimentally RefCdemonstrate quantum charging advantage (QCA) in a scalable solid-state quantum battery.<n>We show how double-excitation Hamiltonians for two-level systems promote scalable QCA.<n>We study the performance of quantum charging compared to its uncorrelated classical counterpart.
• Score: 15.41964054143452
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Quantum battery, as a novel energy storage device, offers the potential for unprecedented efficiency and performance beyond the capabilities of classical systems, with broad implications for future quantum technologies. Here, we experimentally \RefC{demonstrate quantum charging advantage (QCA)} in a scalable solid-state quantum battery. More specifically, we show how double-excitation Hamiltonians for two-level systems promote scalable QCA \RefB{with standard methods.} We effectively implement the collective evolution of quantum systems with 2 up to 12 battery cells in a superconducting quantum processor, and study the performance of quantum charging compared to its uncorrelated classical counterpart. The model considered is a linear chain of superconducting transmon qubits with only \textit{nearest-neighbor} and \textit{pairwise} interactions, which constitute the simplest model of a multi-cell quantum battery. Our results empirically realize substantial QCA without the necessity of adopting long-range and many-body interactions \RefB{ and showcase the quantum features of the QB charging processes with measurements of non-zero coherent ergotropy, incoherent ergotropy and entanglement,} revealing a promising prospect for further developments of efficient and experimentally feasible protocols for QCA.

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