Superextensive charging speeds in a correlated quantum charger

Abstract:We define a quantum charger as an interacting quantum system that transfers energy between two drives. The key figure of merit characterizing a charger is its charging power. Remarkably, the presence of long-range interactions within the charger can induce a collective steady-state charging mode that depends superlinearly on the size of the charger, exceeding the performance of noninteracting, parallel units. Using the driven Lipkin-Meshkov-Glick model and power-law interacting spin chains, we show that this effect persists up to a critical system size set by the breakdown of the high-frequency regime. We discuss optimal work output as well as experimentally accessible initial states. The superlinear charging effect can be probed in trapped-ion experiments, and positions interacting Floquet systems as promising platforms for enhanced energy conversion.

Statistical Mechanics (cond-mat.stat-mech); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)

arXiv:2601.02477 [cond-mat.stat-mech]

(or arXiv:2601.02477v2 [cond-mat.stat-mech] for this version)

https://doi.org/10.48550/arXiv.2601.02477 Focus to learn more arXiv-issued DOI via DataCite

Phys. Rev. B 114, 014313 (2026)

https://doi.org/10.1103/pkc6-c3pd Focus to learn more DOI(s) linking to related resources

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