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Chin. Phys. B, 2016, Vol. 25(7): 070305    DOI: 10.1088/1674-1056/25/7/070305
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Collapse-revival of squeezing of two atoms in dissipative cavities

Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发)
Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
Abstract  Based on the time-convolutionless master-equation approach, we investigate the squeezing dynamics of two atoms in dissipative cavities. We find that the atomic squeezing is related to initial atomic states, atom-cavity couplings, non-Markovian effects and resonant frequencies of an atom and its cavity. The results show that a collapse-revival phenomenon will occur in the atomic squeezing and this process is accompanied by the buildup and decay of entanglement between two atoms. Enhancing the atom-cavity coupling can increase the frequency of the collapse-revival of the atomic squeezing. The stronger the non-Markovian effect is, the more obvious the collapse-revival phenomenon is. In particular, if the atom-cavity coupling or the non-Markovian effect is very strong, the atomic squeezing will tend to a stably periodic oscillation in a long time. The oscillatory frequency of the atomic squeezing is dependent on the resonant frequency of the atom and its cavity.
Keywords:  collapse-revival      atomic squeezing      atom-cavity coupling      non-Markovian effect     
Received:  26 February 2016      Published:  05 July 2016
PACS:  03.65.Yz (Decoherence; open systems; quantum statistical methods)  
  03.67.-a (Quantum information)  
  42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
Fund: Project supported by the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3148), the National Natural Science Foundation of China (Grant No. 11374096), and the Doctoral Science Foundation of Hunan Normal University, China.
Corresponding Authors:  Hong-Mei Zou     E-mail:  zhmzc1997@126.com

Cite this article: 

Hong-Mei Zou(邹红梅), Mao-Fa Fang(方卯发) Collapse-revival of squeezing of two atoms in dissipative cavities 2016 Chin. Phys. B 25 070305

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