Enhanced energy transfer in a Dicke quantum battery

被引:11
|
作者
Zhang, Xiang [1 ,2 ]
Blaauboer, Miriam [2 ]
机构
[1] Beijing Acad Quantum Informat Sci, Beijing, Peoples R China
[2] Delft Univ Technol, Kavli Inst Nanosci, Delft, Netherlands
基金
中国博士后科学基金;
关键词
quantum battery; Tavis-Cumming Hamiltonian; Dicke model; pseudo-Hermite polynomials; quantum speedup; SPONTANEOUS EMISSION; SYSTEMS; ATOMS;
D O I
10.3389/fphy.2022.1097564
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We theoretically investigate the enhancement of the charging power in a Dicke quantum battery which consists of an array of N two-level systems (TLS)coupled to a single mode of cavity photons. In the limit of small N, we analytically solve the time evolution for the full charging process. The eigenvectors of the driving Hamiltonian are found to be pseudo-Hermite polynomials and the evolution is thus interpreted as harmonic oscillator like behaviour. Then we demonstrate the average charging power using a collective protocol is root N times larger than that of the parallel protocol when transferring the same amount of energy. Unlike previous studies, we point out that such quantum advantage does not originate from entanglement but is due to the coherent cooperative interactions among the TLSs. Our results provide intuitive quantitative insight into the dynamic charging process of a Dicke battery and can be observed under realistic experimental conditions.
引用
收藏
页数:8
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