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

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

中国物理B ›› 2010, Vol. 19 ›› Issue (1): 10307-010307.doi: 10.1088/1674-1056/19/1/010307

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

李艳玲, 方卯发, 曾可

College of Physics and Information Science, Hunan Normal University, Changsha 410081, China

收稿日期:2009-03-30 修回日期:2009-04-28 出版日期:2010-01-15 发布日期:2010-01-15
基金资助:
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).

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

Li Yan-Ling(李艳玲),Fang Mao-Fa(方卯发)^†, and Zeng Ke(曾可)

College of Physics and Information Science, Hunan Normal University, Changsha 410081, China

Received:2009-03-30 Revised:2009-04-28 Online:2010-01-15 Published:2010-01-15
Supported by:
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).

摘要/Abstract

摘要： 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 Λ-type atoms.

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.

Key words: quantum entanglement, remote phase gate, remote swap gate

中图分类号: (Quantum computation architectures and implementations)

03.67.Lx

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)

李艳玲, 方卯发, 曾可. One scheme for remote quantum logical gates with the assistance of a classical field[J]. 中国物理B, 2010, 19(1): 10307-010307.

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[J]. Chin. Phys. B, 2010, 19(1): 10307-010307.

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

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

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