中国物理B ›› 2006, Vol. 15 ›› Issue (11): 2518-2522.doi: 10.1088/1009-1963/15/11/010

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A scheme for conditional quantum phase gate viabimodal cavity and a Λ-type three-level atom

蔡建武, 方卯发, 廖湘平, 郑小娟   

  1. College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • 收稿日期:2005-11-22 修回日期:2006-01-08 出版日期:2006-11-20 发布日期:2006-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025).

A scheme for conditional quantum phase gate viabimodal cavity and a Λ-type three-level atom

Cai Jian-Wu(蔡建武)a)b), Fang Mao-Fa(方卯发)a)†, Liao Xiang-Ping(廖湘平)a)b), and Zheng Xiao-Juan(郑小娟)a)   

  1. a College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; b Department of Physics Science and Electronics, Zhuzhou Teacher' College, Zhuzhou 412007, China
  • Received:2005-11-22 Revised:2006-01-08 Online:2006-11-20 Published:2006-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374025).

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摘要： We propose a scheme to implement a two-qubit conditional quantum phase gatefor the intracavity field viaa single three-level $\Lambda$-type atom driven by two modes in a high-Q cavity. The quantum information is encoded on the Fock states of the bimodal cavity. The gate's averaged fidelity is expected to reach $99.8\%$.

关键词: quantum phase gate, $\Lambda$-type three-level atom, bimodal cavity, fidelity

Abstract: We propose a scheme to implement a two-qubit conditional quantum phase gatefor the intracavity field viaa single three-level $\Lambda$-type atom driven by two modes in a high-Q cavity. The quantum information is encoded on the Fock states of the bimodal cavity. The gate's averaged fidelity is expected to reach $99.8\%$.

Key words: quantum phase gate, $\Lambda$-type three-level atom, bimodal cavity, fidelity

中图分类号:  (Quantum state engineering and measurements)

  • 42.50.Dv
03.67.Lx (Quantum computation architectures and implementations) 42.50.Ct (Quantum description of interaction of light and matter; related experiments) 42.50.Pq (Cavity quantum electrodynamics; micromasers)