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Magnon-mediated quantum battery under systematic errors
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DOI：10.1103/PhysRevA.104.032606.png)
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The quantum battery is one of the most prominent microdevices in the rapid-developing field of quantum thermodynamics. We propose a long-range charging protocol in which both battery and charger consist of a many-spin system. The battery and charger are indirectly connected via a quantum wire supported by the Kittle mode of a magnon system. Counterintuitively, we find that the undesired spin-spin couplings among both battery and charger can be used to promote the charging performance in comparison with the noninteracting condition. And a sweet spot of the average coupling strength allows the battery to store energy to the maximum possible value. Moreover, we apply the quantum-state-diffusion equation to estimate the robustness of our magnon-mediated charging protocol to the fluctuation in the magnon frequency.
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2.9
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69
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14.3W
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