Magnon-mediated quantum battery under systematic errors
Abstract
Quantum battery is one of the most prominent micro-devices in the rapid-developing quantum thermodynamics. We propose a quantum charging protocol in which both battery and charger are consisted of a many-spin system. The battery and charger are connected via the Kittle mode of the magnon system, that serves as a charging wire and then enables a long-range charging protocol. Counter-intuitively, we find that the spin-spin couplings insider both battery and charger can be used to promote the charging performance in comparison to the noninteracting condition. And a remarkable promotion is realized at a "sweet" spot in terms of the average coupling strength. Moreover, we apply the quantum-state-diffusion equation to test the robustness of our magnon-mediated charging protocol to the systematic errors about the magnon frequency.
Cite
@article{arxiv.2105.08387,
title = {Magnon-mediated quantum battery under systematic errors},
author = {Shi-fan Qi and Jun Jing},
journal= {arXiv preprint arXiv:2105.08387},
year = {2021}
}