One scheme for remote quantum logical gates with the assistance of a classical field

doi:10.1088/1674-1056/19/1/010307

Abstract A scheme, based on the two two-level atoms resonantly driven by the classical field separately trapped in two cavities coupled by an optical fibre, for the implementation of remote two-qubit gates is investigated. It is found that the quantum controlled-phase and swap gates can be achieved with the assistance of the classical field when there are detunings of the coupling quantum fields. Moreover, the influence of the dissipation of the cavities and the optical fibre is analysed while the spontaneous emission of the atoms can be effectively suppressed by introducing $\Lambda$-type atoms.

Keywords: quantum entanglement remote phase gate remote swap gate

Received: 30 March 2009
Revised: 28 April 2009
Accepted manuscript online:

PACS:	03.67.Lx	(Quantum computation architectures and implementations)
	03.65.Ud	(Entanglement and quantum nonlocality)
	03.67.Mn	(Entanglement measures, witnesses, and other characterizations)
	42.50.Dv	(Quantum state engineering and measurements)
	42.81.-i	(Fiber optics)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10374025), the Natural Science Foundation of Hunan Province of China (Grant Nos. 07JJ3013 and 07JJ5003) and the Education Ministry of Hunan Province of China (Grant No. 06A038).

Cite this article:

Li Yan-Ling(李艳玲),Fang Mao-Fa(方卯发), and Zeng Ke(曾可) One scheme for remote quantum logical gates with the assistance of a classical field 2010 Chin. Phys. B 19 010307

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