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Chin. Phys. B, 2018, Vol. 27(12): 124206    DOI: 10.1088/1674-1056/27/12/124206

Dynamic properties of atomic collective decay in cavity quantum electrodynamics

Yu-Feng Han(韩玉峰)1,2, Cheng-Jie Zhu(朱成杰)1, Xian-Shan Huang(黄仙山)2, Ya-Ping Yang(羊亚平)1
1 Key Laboratory of Advanced Micro-Structured Materials of the Ministry of Education, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China;
2 School of Mathematics and Physics, Anhui University of Technology, Ma'anshan 243032, China

We theoretically study the collective decay of two atoms trapped in a single mode cavity and describe the evolution of the population of Dicke states. We show that the collective decay property is strongly dependent on the phase of atomic radiation and the speeding up of collective decay can be observed in bad cavity regime. For in- or out-phase case, it occurs due to the quantum interference enhancement no matter which atom is excited initially. For π/2 phase, the speeding up of collective decay takes place if the first atom is excited at the beginning. However, it disappears due to the quantum interference cancelation if the second atom is excited. Compared with the in-phase and out-phase cases, we also show that the speeding up of collective decay can be significantly enhanced in strong coupling regime for π/2 phase although one atom is decoupled to the cavity in this condition. The study presented here is helpful to understand the physical mechanism of collective decay in cavity quantum electrodynamics, and provide a useful method to control the collective decay phenomenon via quantum interference effect.

Keywords:  quantum interference      collective decay      cavity quantum electrodynamics  
Received:  14 July 2018      Revised:  20 August 2018      Accepted manuscript online: 
PACS:  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
  42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)  
  37.30.+i (Atoms, molecules, andions incavities)  

Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262, 11474003, and 11504003), the National Key Basic Research Special Foundation (Grant No. 2016YFA0302800), the Joint Fund of the National Natural Science Foundation of China (Grant No. U1330203), the Fund from the Shanghai Science and Technology Committee (STCSM), and the Natural Science Foundation of Anhui Province, China (Grant Nos. 1408085MA19 and 1608085ME102).

Corresponding Authors:  Cheng-Jie Zhu, Ya-Ping Yang     E-mail:;

Cite this article: 

Yu-Feng Han(韩玉峰), Cheng-Jie Zhu(朱成杰), Xian-Shan Huang(黄仙山), Ya-Ping Yang(羊亚平) Dynamic properties of atomic collective decay in cavity quantum electrodynamics 2018 Chin. Phys. B 27 124206

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