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
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
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).
LU Hong;CHEN Li-Bing;CHEN Wei-Cheng;ZHOU Zheng-Wei. Preparation of the W State of Atoms in a Single Cavity or N Distant Cavities by Photon Interference[J]. 中国物理快报, 2004, 21(8): 1417-1420.
LU Hong, CHEN Li-Bing, CHEN Wei-Cheng, ZHOU Zheng-Wei. Preparation of the W State of Atoms in a Single Cavity or N Distant Cavities by Photon Interference. Chin. Phys. Lett., 2004, 21(8): 1417-1420.
2004, Vol. 21 
