Energetic channels in finite many-body quantum charging
Abstract
We examine how a finite many-body system can function as an effective charger for a single-qubit quantum battery, using the Lipkin-Meshkov-Glick model as a paradigmatic setting. As our figure of merit, we consider the battery ergotropy while explicitly resolving the energetic flows across the composite system. In the absence of intra-charger interactions, we show that the generation of non-zero ergotropy is controlled by the competition between collective coupling and spectral mismatch. We further demonstrate that even passive positive-temperature charger states can generate finite battery ergotropy, provided the charger is sufficiently large and sufficiently hot. Intra-charger interactions restructure the charger spectrum and qualitatively modify the available energetic pathways. While they can enhance the amount of energy accessible for charging, they can simultaneously divert energy into internal many-body and battery-charger interaction channels, producing an energetic impedance to direct charger-to-battery transfer. Consequently, battery ergotropy alone is insufficient to characterize an effective many-body charger: the useful work generated and its energetic provenance must be assessed together.
Related
- Error-Correction Transitions in Finite-Depth Quantum Channels
- Revealing Many-Body Phases at finite temperatures through Quantum Coherence Distribution
- Hierarchical Decoupling of Informational and Energetic Channels in Dissipative Chaos: From Microscopic Tangles to Macroscopic Transport
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BibTeX
@misc{murphy2026energetic,
title = {{Energetic channels in finite many-body quantum charging}},
author = {Dara Murphy and George Mihailescu and Anne Matthies and Irene D'Amico and Steve Campbell},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.22034},
eprint = {2610.22034},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.22034},
}
RIS
TY - UNPB
TI - Energetic channels in finite many-body quantum charging
AU - Dara Murphy
AU - George Mihailescu
AU - Anne Matthies
AU - Irene D'Amico
AU - Steve Campbell
PY - 2026
DA - 2026/10/15
PB - arXiv
DO - 10.48550/arxiv.2610.22034
UR - https://arxiv.org/abs/2610.22034
AB - We examine how a finite many-body system can function as an effective charger for a single-qubit quantum battery, using the Lipkin-Meshkov-Glick model as a paradigmatic setting. As our figure of merit, we consider the battery ergotropy while explicitly resolving the energetic flows across the composite system. In the absence of intra-charger interactions, we show that the generation of non-zero ergotropy is controlled by the competition between collective coupling and spectral mismatch. We further demonstrate that even passive positive-temperature charger states can generate finite battery ergotropy, provided the charger is sufficiently large and sufficiently hot. Intra-charger interactions restructure the charger spectrum and qualitatively modify the available energetic pathways. While they can enhance the amount of energy accessible for charging, they can simultaneously divert energy into internal many-body and battery-charger interaction channels, producing an energetic impedance to direct charger-to-battery transfer. Consequently, battery ergotropy alone is insufficient to characterize an effective many-body charger: the useful work generated and its energetic provenance must be assessed together.
ER -