Abstract A scheme is proposed for the generation of W entangled states for several atoms trapped in a cavity by detecting photon decay. The scheme works in the regime, where the cavity decay rate is larger than the atom-cavity coupling strength. Thus, the requirement for the quality factor of the cavity is greatly loosened, which is of importance in view of experiment. Another advantage of this scheme is that the atoms are always populated in two ground states coupled by Raman transitions, thus the spontaneous emission can also be suppressed.
Received: 23 September 2004
Revised: 28 October 2004
Accepted manuscript online:
Fund: Project supported by the Fok Ying Tung Education Foundation, China (Grant No 81008) and the National Natural Science Foundation of China (Grant Nos 60008003 and 10225421).
Cite this article:
Zheng Shi-Biao (郑仕标) Robust scheme for the generation of entangled states for N atoms in a cavity 2005 Chinese Physics 14 533
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