Chin. Phys. Lett.  2007, Vol. 24 Issue (3): 609-612    DOI:
Original Articles |
Continuous Variable Entanglement and Violation of Bell Inequality for Two Modes in a Three-Level Cascade Atomic System
PING Yun-Xia;CHENG Ze
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
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PING Yun-Xia, CHENG Ze 2007 Chin. Phys. Lett. 24 609-612
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Abstract Continuous variable entanglement and violation of Bell inequality for two modes are investigated in a three-level cascade atomic system. Entanglement of the system is demonstrated according to the entanglement criterion [Phys. Rev. Lett. 84(2000)2722]. Violation of Bell inequality is studied within the framework of a quantum theory of multiwave mixing. It is shown that there are some states that are entangled but do not violate the Bell inequality.
Keywords: 03.67.Mn      42.50.Dv     
Received: 24 October 2006      Published: 08 February 2007
PACS:  03.67.Mn (Entanglement measures, witnesses, and other characterizations)  
  42.50.Dv (Quantum state engineering and measurements)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I3/0609
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PING Yun-Xia
CHENG Ze
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