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Preparation of the W State of Atoms in a Single Cavity or N Distant Cavities by Photon Interference |
| LU Hong1,2,CHEN Li-Bing1;CHEN Wei-Cheng1;ZHOU Zheng-Wei2 |
| 1Department of Physics, Foshan University, Foshan 528000
2Key Laboratory of Quantum information, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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LU Hong, CHEN Li-Bing, CHEN Wei-Cheng et al 2004 Chin. Phys. Lett. 21 1417-1420 |
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Abstract We suggest two schemes to generate the W state of N Λ-type three-level atoms. In the schemes, identical N three-level atoms are trapped in a cavity or N distant cavities. The success or failure of the generation of the W state can be determined by detecting the polarization of photon leaking out of the cavity. The result demonstrates that the W state is free from both the cavity loss and the spontaneous emission due to the fact that the two ground states (left and right) of the three-level atoms are stable states (or metastable states).
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| Keywords:
03.65.Ud
03.50.Ct
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Published: 01 August 2004
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