中国物理B ›› 2008, Vol. 17 ›› Issue (1): 190-193.doi: 10.1088/1674-1056/17/1/033

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED

姜春蕾, 方卯发, 胡要花   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    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).

Efficient scheme of quantum SWAP gate and multi-atom cluster state via cavity QED

Jiang Chun-Lei(姜春蕾), Fang Mao-Fa(方卯发)†, and Hu Yao-Hua(胡要花)   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    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.

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.

Key words: cluster states, SWAP gate, cavity QED

中图分类号:  (Cavity quantum electrodynamics; micromasers)

  • 42.50.Pq
03.67.Lx (Quantum computation architectures and implementations) 03.65.Ud (Entanglement and quantum nonlocality)