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.
Received: 24 September 2008
Revised: 10 November 2008
Accepted manuscript online:
Fund: 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).
Cite this article:
Zheng Shi-Biao(郑仕标) Robust scheme for implemention of quantum phase gates for two atoms 2009 Chin. Phys. B 18 3453
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