Enhanced energy transfer in a Dicke quantum battery

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 eigen...

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Bibliographic Details
Published inFrontiers in physics Vol. 10
Main Authors Zhang, Xiang, Blaauboer, Miriam
Format Journal Article
LanguageEnglish
Published Frontiers Media S.A 09.01.2023
Subjects
Dicke model
pseudo-Hermite polynomials
quantum battery
quantum speedup
Tavis-Cumming Hamiltonian
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ISSN2296-424X
2296-424X
DOI10.3389/fphy.2022.1097564

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Summary: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 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.
ISSN:2296-424X
2296-424X
DOI:10.3389/fphy.2022.1097564