Abstract In this paper, we propose a physical scheme to realize quantum SWAP gate by using a large-detuned single-mode cavity field and two identical Rydberg atoms. It is shown that the scheme can also be used to create multi-atom cluster state. During the interaction between atom and cavity, the cavity is only virtually excited and thus the scheme is insensitive to the cavity field states and cavity decay. With the help of our scheme it is very simple to prepare the $N$-atom cluster state with perfect fidelity and probability. The practical feasibility of this method is also discussed.
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10374025) and Major
Project supported by the Ministry of Education of Hunan Province,
China (Grant No 06A038).
Cite this article:
Jiang Chun-Lei(姜春蕾), Fang Mao-Fa(方卯发), and Hu Yao-Hua(胡要花) Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED 2008 Chin. Phys. B 17 190
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