https://doi.org/10.1140/epjp/s13360-026-07486-y
Regular Article
Quantum battery capacity for quantum phase transition with Dzyaloshinskii–Moriya interaction
1
Department of Information Engineering, Changzhou Vocational Institute of Industry, Technology, 213164, Changzhou, Jiangsu, China
2
School of Physical Science and Technology, Yangzhou University, 225009, Yangzhou, Jiangsu, China
3
School of Mechatronic Engineering and Automation, Shanghai University, 200444, Shanghai, China
4
Department of Physics, East China University of Technology, 330000, Nanchang, China
a
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Received:
2
November
2025
Accepted:
22
February
2026
Published online:
5
March
2026
Abstract
We investigate the quantum battery capacity of a two-qubit system coupled with an anisotropic XY spin chain with Dzyaloshinskii–Moriya (DM) interaction. Our results show that the battery capacity serves as a sensitive indicator of quantum phase transition, exhibiting a sharp change at the critical point. The DM interaction enhances capacity away from criticality but suppresses it near the transition. Environmental coupling strongly reduces capacity, with even weak coupling causing rapid energy leakage, especially in the thermodynamic limit where decoherence drives capacity to a lower bound. We also reveal a non-monotonic relationship between quantum discord and capacity, which reflects the dynamic interplay between energy storage and quantum correlations. These findings provide insights into optimizing quantum batteries through control of interactions and environmental coupling.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
