Quantum advantage in charging cavity and spin batteries by repeated interactions
arXiv:2205.00026 · doi:10.1103/PhysRevResearch.5.013155
Abstract
Recently, an unconditional advantage has been demonstrated for the process of charging of a quantum battery in a collisional model. Motivated by the question of whether such an advantage could be observed experimentally, we consider a model where the battery is modeled by a quantum harmonic oscillator or a large spin, charged via repeated interactions with a stream of non-equilibrium qubit units. For both setups, we show that a quantum protocol can significantly outperform the most general adaptive classical schemes, leading to 90\% and 38\% higher charging power for the cavity and large spin batteries respectively. Towards an experimental realization, we also characterise the robustness of this quantum advantage to imperfections (noise and decoherence) considering implementations with state-of-the-art micromasers and hybrid superconducting devices.
arXiv comment10+4 pages, 6 figures Related to: arXiv:2105.01863 and arXiv:2204.09995
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