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Concentration of Unknown Atomic Entangled States via Entanglement Swapping through Raman Interaction |
| ZOU Jin-Hua, HU Xiang-Ming |
| Department of Physics, Huazhong Normal University, Wuhan 430079 |
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| Cite this article: |
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ZOU Jin-Hua, HU Xiang-Ming 2008 Chin. Phys. Lett. 25 3142-3145 |
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Abstract We show that entanglement concentration of unknown atomic entangled states is achieved via the implementation of entanglement swapping based on Raman interaction in cavity QED. A maximally entangled state is obtained from a pair of partially entangled states probabilistically. Due to Raman
interaction of two atoms with a cavity mode and an external driving field, the influence of atomic spontaneous emission has been eliminated. Because of the virtual excitation of the cavity mode, the decoherence of cavity decay and thermal field is neglected.
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| Keywords:
03.67.Mn
03.65.Ud
42.50.Dv
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Received: 07 December 2007
Published: 29 August 2008
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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42.50.Dv
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(Quantum state engineering and measurements)
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