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This study demonstrates that in ultrastrong-coupling regimes, the interplay between coupling strength and dissipation can simultaneously maximize charging speed and ensure long-term stability against energy growth. By applying optimal control theory, researchers achieve a steady state with finite energy and ergotropy, offering a viable pathway for robust quantum battery design. The findings provide critical theoretical insights for managing open-system dynamics in future quantum energy storage architectures.
Optimal control of a dissipative micromaser quantum battery in the ultrastrong coupling regime
arXiv:2601.10281v2 Announce Type: replace Abstract: We investigate the open-system dynamics of a micromaser quantum battery in the ultrastrong-coupling (USC) regime. The battery consists of a quantized harmonic mode sequentially interacting, via the Rabi Hamiltonian, with a stream of qubits acting as chargers. USC enhances the charging speed but also induces unbounded energy growth and highly mixed cavity states. Dissipation suppresses this behavior, driving the system to a steady state with finite energy and ergotropy. Using optimal control theory, we show that the interplay between USC and dissipation enhances both charging performance and long-term stability against losses.
Abstract:We investigate the open-system dynamics of a micromaser quantum battery in the ultrastrong-coupling (USC) regime. The battery consists of a quantized harmonic mode sequentially interacting, via the Rabi Hamiltonian, with a stream of qubits acting as chargers. USC enhances the charging speed but also induces unbounded energy growth and highly mixed cavity states. Dissipation suppresses this behavior, driving the system to a steady state with finite energy and ergotropy. Using optimal control theory, we show that the interplay between USC and dissipation enhances both charging performance and long-term stability against losses.
This is the Accepted Manuscript version of an article accepted for publication in "Quantum Science and Technology". IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This Accepted Manuscript is published under a CC BY licence. The Version of Record is available online at this https URL
Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
arXiv:2601.10281 [quant-ph]
(or arXiv:2601.10281v2 [quant-ph] for this version)
Quantum Sci. Technol. 11, 035001 (2026)
https://doi.org/10.1088/2058-9565/ae6fe5 DOI(s) linking to related resources
Full text under the publisher's open licence · 180 words
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