中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3453-3456.doi: 10.1088/1674-1056/18/8/054

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Robust scheme for implemention of quantum phase gates for two atoms

郑仕标   

  1. Department of Physics, Fuzhou University, Fuzhou \rm 350002, China
  • 收稿日期:2008-09-24 修回日期:2008-11-10 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10674025) and the Doctoral Foundation of the Ministry of Education of China (Grant No 20070386002).

Robust scheme for implemention of quantum phase gates for two atoms

Zheng Shi-Biao(郑仕标)†   

  1. Department of Physics, Fuzhou University, Fuzhou \rm 350002, China
  • Received:2008-09-24 Revised:2008-11-10 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10674025) and the Doctoral Foundation of the Ministry of Education of China (Grant No 20070386002).

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摘要： We propose a scheme for implementing conditional quantum phase gates for two four-state atoms trapped in a cavity. The two ground states of the atoms are coupled through two Raman processes induced by the cavity mode and two classical fields. Under certain conditions nonresonant Raman processes lead to two-atom coupling and can be used to produce conditional phase gates. The scheme is insensitive to cavity decay, thermal photons, and atomic spontaneous emission. The scheme does not require individual addressing of the atoms.

Abstract: We propose a scheme for implementing conditional quantum phase gates for two four-state atoms trapped in a cavity. The two ground states of the atoms are coupled through two Raman processes induced by the cavity mode and two classical fields. Under certain conditions nonresonant Raman processes lead to two-atom coupling and can be used to produce conditional phase gates. The scheme is insensitive to cavity decay, thermal photons, and atomic spontaneous emission. The scheme does not require individual addressing of the atoms.

Key words: quantum phase gates, Raman process, two-atom coupling

中图分类号:  (Quantum optics)

  • 42.50.-p
03.67.Lx (Quantum computation architectures and implementations) 32.30.-r (Atomic spectra?)