Two-Mode Steady-State Entanglement in a Four-Level Atomic System
PING Yun-Xia1** , ZHANG Chao-Min1 , CHEN Guang-Long1 , ZHU Peng-Fei1 , CHENG Ze2
1 College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 2016002 School of Physics, Huazhong University of Science and Technology, Wuhan 430074
Abstract ：We investigate the continuous variable entanglement in a four-level atom according to the criterion proposed by Duan et al. [Phys. Rev. Lett. 84 (2000) 2722 ]. The atomic coherence is introduced using two external classical driving fields. We study the steady-state entanglement of the system in the presence of losses, concluding that the creation of entangled states can be achievable under certain conditions.
收稿日期: 2012-11-28
出版日期: 2013-04-28
:
42.50.Dv
(Quantum state engineering and measurements)
03.67.Mn
(Entanglement measures, witnesses, and other characterizations)
03.65.Ud
(Entanglement and quantum nonlocality)
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2013, Vol. 30 
