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arXiv · 2601.12183

Maximum-precision charging of multi-qubit quantum batteries

Davide Rinaldi·Radim Filip·Dario Gerace·Giacomo Guarnieri
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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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Davide Rinaldi, Radim Filip, Dario Gerace, Giacomo Guarnieri. 2026-01-17. Maximum-precision charging of multi-qubit quantum batteries. https://doi.org/10.1103/b19l-sxnt

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