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Superextensive charging speeds in a correlated quantum charger

Harald Schmid1,2,3,*, Felix von Oppen4,†, Gil Refael5,‡, and Yang Peng6,5,§

  • *Contact author: h.schmid@tum.de
  • †Contact author: vonoppen@physik.fu-berlin.de
  • ‡Contact author: refael@caltech.edu
  • §Contact author: yang.peng@csun.edu
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Phys. Rev. B 114, 014313 – Published 20 July, 2026

DOI: https://doi.org/10.1103/pkc6-c3pd

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.

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Physics Subject Headings (PhySH)

See Also

Non-Abelian geometric quantum energy pump

Yang Peng
Phys. Rev. B 114, L020304 (2026)

Article Text

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Phys. Rev. B 114, 014313– Published 20 July, 2026
  • Received 14 January 2026
  • Revised 1 July 2026
  • Accepted 7 July 2026
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