Abstract This paper proposes a simple scheme for generating a three-atom GHZ state via cavity quantum electrodynamics (QED). The task can be achieved through the interaction between two EPR states, which can be prepared easily with current technology. In this scheme, the cavity field is only virtually excited during the interaction process, and no quantum information transfer between the atoms and the cavity is required. Thus it greatly prolongs the efficient decoherent time. Moreover, this scheme is also applicable for generating an N-atom GHZ state.
Received: 11 November 2006
Revised: 27 November 2006
Accepted manuscript online:
Fund: Project supported by the
National Natural Science Foundation of China (Grant No 10574001)
and the Program of the Education Department of Anhui Province
(Grant No 2004kj029).
Cite this article:
Wang Jun(王俊), Yu Long-Bao(余龙宝), and Ye Liu(叶柳) A simple scheme for generating multi-atom GHZ state via cavity QED 2007 Chinese Physics 16 2211
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