Synergistic charging of a quantum battery via Dzyaloshinskii-Moriya interaction and non-Markovian noise

Abstract:Protecting quantum batteries from environmental noise remains a challenge. Using exact Burshtein-Kubo equations, we study a two-spin quantum battery with Dzyaloshinskii-Moriya (DM) coupling under indepen dent local longitudinal random telegraph noise (RTN). At a fixed effective noise scale, the DM-assisted slow switching protocol yields a superadditive transient ergotropy gain and near-maximal ergotropy during the initial charging stage, while the no-DM slow-switching control reaches comparable ergotropy only in a later revival. A finite superadditive region persists at fixed RTN amplitude, with protocol-dependent location and gain. In the Ising model, the enhancement is nonmonotonic in DM strength, with intermediate coupling giving near-optimal performance. Dressed-channel analysis associates this enhancement with changes in transition frequencies and longitudinal-noise matrix elements that reduce slow-RTN spectral weight. Superadditivity also persists in the tested anisotropic XY model.

12 pages, 13 figures. Accepted by Physical Review A, comments are welcome

arXiv:2610.21928 [quant-ph]

(or arXiv:2610.21928v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2610.21928 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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