| Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED |
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| 作者姓名： | 姜春蕾 方卯发 胡要花 |
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| 作者单位： | College of Physics and Information Science, Hunan Normal
University, Changsha 410081, China;College of Physics and Information Science, Hunan Normal
University, Changsha 410081, China;College of Physics and Information Science, Hunan Normal
University, Changsha 410081, China |
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| 基金项目： | 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). |
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| 摘 要： | 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.
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| 关 键 词： | 簇集状态 SWAP 空泡 QED 量子学 |
| 收稿时间： | 2007-03-24 |
| 修稿时间： | 2007-03-31 |
Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED |
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| Jiang Chun-Lei,Fang Mao-Fa and Hu Yao-Hua.Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED[J].Chinese Physics B,2008,17(1):190-193. |
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| Authors: | Jiang Chun-Lei Fang Mao-Fa and Hu Yao-Hua |
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| Institution: | College of Physics and Information Science, Hunan Normal
University, Changsha 410081, China |
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| 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. |
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| Keywords: | cluster states SWAP gate cavity QED |
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