%0 Journal Article
%T Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED
%A Jiang Chun-Lei
%A Fang Mao-Fa
%A Hu Yao-Hua
%A <br>姜春蕾
%A 方卯发
%A 胡要花
%J 中国物理 B
%D 2008
%I 
%X 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.
%K cluster states
%K SWAP gate
%K cavity QED<br>簇集状态
%K SWAP
%K 空泡
%K QED
%K 量子学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=91ABE5FB86E80197B856F4B7C2C3F1E6&yid=67289AFF6305E306&vid=BCA2697F357F2001&iid=CA4FD0336C81A37A&sid=6235172E4DDBA109&eid=23104246A5FCFCEF&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0