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Chin. Phys. B, 2013, Vol. 22(5): 050307    DOI: 10.1088/1674-1056/22/5/050307
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Generation of four-atom Greenberger-Horn-Zeilinger state via adiabatic passage

Zhang Chun-Ling (张春玲), Chen Mei-Feng (陈美锋)
Laboratory of Quantum Optics, Department of Physics, Fuzhou University, Fuzhou 350002, China
Abstract  We propose a scheme to generate a Greenberger-Horn-Zeilinger (GHZ) state of four atoms trapped in a two-mode optical cavity via an adiabatic passage. The scheme is robust against moderate fluctuations of the experimental parameters. Numerical calculations show that the excited probabilities of both the cavity modes and the atoms are tiny and depend on the pulse peaks of the classical laser fields. For certain decoherence due to the atomic spontaneous emission and the cavity decay, there exits a range of pulse peaks to get a high fidelity.
Keywords:  Greenberger-Horn-Zeilinger (GHZ) state      adiabatic passage      cavity quantum electrodynamics  
Received:  16 September 2012      Revised:  03 December 2012      Accepted manuscript online: 
PACS:  03.67.Bg (Entanglement production and manipulation)  
  42.50.Dv (Quantum state engineering and measurements)  
  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB921601), the National Natural Science Foundation of China (Grant No. 10974028), and the Doctoral Foundation of the Ministry of Education of China (Grant No. 20093514110009).
Corresponding Authors:  Zhang Chun-Ling     E-mail:  mzhangchunling@163.com

Cite this article: 

Zhang Chun-Ling (张春玲), Chen Mei-Feng (陈美锋) Generation of four-atom Greenberger-Horn-Zeilinger state via adiabatic passage 2013 Chin. Phys. B 22 050307

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