Related papers: A continuous variable quantum battery with wireless and remote charging

A continuous variable quantum battery with wireless and remote charging

URL: http://arxiv.org/abs/2507.07488v1
Date: Thu, 10 Jul 2025 07:21:11 GMT
Title: A continuous variable quantum battery with wireless and remote charging
Authors: Jun Wen, Zheng Wen, Ping Peng, Guan-Qiang Li,
Abstract summary: We design a wireless and remote charging scheme based on the quantized Hamiltonian of two LC coupled circuits.<n>It is found that the quantum entanglement, which is regarded as a significant quantum resource, is not a prerequisite for charging the battery and extracting useful work.
Score: 12.802009684565606
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Quantum battery has become one of the hot issues at the research frontiers of quantum physics recently. Charging power, extractable work and wireless charging over long-distance are three important aspects of interest. Non-contact electromagnetic interaction provides an important avenue for wireless charging. In this paper, we design a wireless and remote charging scheme based on the quantized Hamiltonian of two coupled LC circuits, and focus on the charging dynamics of a continuous variable quantum battery. It is found that the quantum entanglement, which is regarded as a significant quantum resource, is not a prerequisite for charging the battery and extracting useful work. On the contrary, all of the energy in the battery could be converted into useful work in the absence of the entanglement for our model. The often overlooked counter-rotating wave coupling in the interacting Hamiltonian is helpful for extracting more useful work from the charger. If the coupling between the battery and the charger is designed to contain both the rotating and counter-rotating wave couplings, the extractable work can be obtained even if the charger is prepared in thermal states, while such effect cannot be achieved in the presence of a rotating or counter-rotating wave coupling alone. Finally, the effect of the system's parameters on the extractable work is discussed, which will provide a reference for full use of the thermal state energy.

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