开放系统中里德伯量子电池的稳定充电

Stable charging of a Rydberg quantum battery in an open system.

作者信息

Yao Y, Shao X Q

机构信息

Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China and Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China.

出版信息

Phys Rev E. 2021 Oct;104(4-1):044116. doi: 10.1103/PhysRevE.104.044116.

DOI:10.1103/PhysRevE.104.044116

PMID:34781510

Abstract

The charging of an open quantum battery is investigated where the charger and the quantum battery interact with a common environment. At zero temperature, the stored energy of the battery is optimal as the charger and the quantum battery share the same coupling strength (g_{C}=g_{B}). By contrast, in the presence of the quantum jump-based feedback control, the energy stored in the battery can be greatly enhanced for different couplings (g_{C}>g_{B}). Considering the feasibility of the experiment, a model of Rydberg quantum battery is proposed with cascade-type atoms interacting with a dissipative optical cavity. The effective coupling strength between the charger (quantum battery) and the cavity field is hence adjustable and one can make the battery close to perfect excitation. The adverse factors of charging quantum batteries such as time delay for feedback, finite temperature, and spontaneous emission of Rydberg atoms are also discussed, and the result shows that the quantum battery is still able to retain a satisfactory energy storage effect.

摘要

研究了开放量子电池的充电过程，其中充电器和量子电池与共同环境相互作用。在零温度下，当充电器和量子电池具有相同的耦合强度（(g_{C}=g_{B})）时，电池存储的能量是最优的。相比之下，在基于量子跳跃的反馈控制存在的情况下，对于不同的耦合（(g_{C}>g_{B})），电池中存储的能量可以大大增强。考虑到实验的可行性，提出了一种里德堡量子电池模型，其中级联型原子与耗散光学腔相互作用。因此，充电器（量子电池）与腔场之间的有效耦合强度是可调节的，并且可以使电池接近完美激发。还讨论了给量子电池充电的不利因素，如反馈延迟、有限温度和里德堡原子的自发辐射，结果表明量子电池仍然能够保持令人满意的能量存储效果。