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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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| Cite this article: |
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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.
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| Keywords:
03.67.Mn
42.50.Dv
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Received: 24 October 2006
Published: 08 February 2007
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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42.50.Dv
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(Quantum state engineering and measurements)
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