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  • Letter
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  • Access by Xinjiang University

Maximum-precision charging of multiqubit quantum batteries

Davide Rinaldi1,*, Radim Filip2, Dario Gerace1, and Giacomo Guarnieri1,3

  • 1Dipartimento di Fisica “A. Volta,” Università di Pavia, via Bassi 6, 27100 Pavia, Italy
  • 2Department of Optics, Faculty of Science, Palacký University, 17. listopadu 12, 77900 Olomouc, Czech Republic
  • 3INFN Sezione di Pavia, Via Agostino Bassi 6, I-27100 Pavia, Italy

  • *Contact author: davide.rinaldi02@universitadipavia.it
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Phys. Rev. A 114, L030601 – Published 1 September, 2026

DOI: https://doi.org/10.1103/b19l-sxnt

Abstract

Precision, robustness, and efficiency are central requirements for quantum technologies. We show that genuine quantum features combined with non-Gaussianity enable the simultaneous optimization of these properties in a quantum battery-charging process. Using a generalized Jaynes-Cummings interaction as a paradigmatic light-matter interaction model, we apply the Full Counting Statistics to characterize stochastic energy exchanges between a stack of qubits and a single-mode bosonic field. We demonstrate that a sequential charging protocol driven by a non-Gaussian quantum field yields high performance in charging precision, which remains maximal even under suboptimal operating conditions. Our results establish the use of non-Gaussian quantum states in battery charging as a robust route to a quantum precision advantage over protocols based on Gaussian states, achieved through the suppression of detrimental quantum fluctuations.

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Phys. Rev. A 114, L030601– Published 1 September, 2026
  • Received 17 January 2026
  • Accepted 4 August 2026
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