Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system

doi:10.1088/1674-1056/19/3/034207

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 34207-034207.doi: 10.1088/1674-1056/19/3/034207

Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system

方卯发¹, 朱开成², 郑小娟³, 徐慧³

(1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)School of Material Science and Engineering, Central South University, Changsha 410083, China; (3)School of Material Science and Engineering, Central South University, Changsha 410083, China;School of Physics Science and Technology, Central South University, Changsha 410083, China

收稿日期:2009-05-14 修回日期:2009-06-08 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
Project supported by the Postdoctal Foundation of Central South University of China, the Important Program of Hunan Provincial Education Department of China (Grant No.~06A038), Department of Education of Hunan Province of China (Grant No.~06C080), and Hunan Provincial Natural Science Foundation, China (Grant No.~07JJ3013).

Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system

Zheng Xiao-Juan (郑小娟)^a)b), Xu Hui(徐慧)^a)b), Fang Mao-Fa(方卯发)^c), and Zhu Kai-Cheng(朱开成)^a)

^a School of Material Science and Engineering, Central South University, Changsha 410083, China; ^b School of Physics Science and Technology, Central South University, Changsha 410083, China; ^c College of Physics and Information Science, Hunan Normal University, Changsha 410081, China

Received:2009-05-14 Revised:2009-06-08 Online:2010-03-15 Published:2010-03-15
Supported by:
Project supported by the Postdoctal Foundation of Central South University of China, the Important Program of Hunan Provincial Education Department of China (Grant No.~06A038), Department of Education of Hunan Province of China (Grant No.~06C080), and Hunan Provincial Natural Science Foundation, China (Grant No.~07JJ3013).

摘要/Abstract

摘要： This paper proposes a simple scheme to generate a four-atom entangled cluster state in cavity quantum electrodynamics. With the assistantce of a strong classical field the cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity during the preparation for a four-atom entangled cluster state, and thus the scheme is insensitive to the cavity field states and cavity decay. Assuming that deviation of laser intensity is 0.01 and that of simultaneity for the interaction is 0.01, it shows that the fidelity of the resulting four-atom entangled cluster state is about 0.9886. The scheme can also be used to generate a four-ion entangled cluster state in a hot trapped-ion system. Assuming that deviation of laser intensity is 0.01, it shows that the fidelity of the resulting four-ion entangled cluster state is about 0.9990. Experimental feasibility for achieving this scheme is also discussed.

Abstract: This paper proposes a simple scheme to generate a four-atom entangled cluster state in cavity quantum electrodynamics. With the assistantce of a strong classical field the cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity during the preparation for a four-atom entangled cluster state, and thus the scheme is insensitive to the cavity field states and cavity decay. Assuming that deviation of laser intensity is 0.01 and that of simultaneity for the interaction is 0.01, it shows that the fidelity of the resulting four-atom entangled cluster state is about 0.9886. The scheme can also be used to generate a four-ion entangled cluster state in a hot trapped-ion system. Assuming that deviation of laser intensity is 0.01, it shows that the fidelity of the resulting four-ion entangled cluster state is about 0.9990. Experimental feasibility for achieving this scheme is also discussed.

Key words: cavity quantum electrodynamics (QED), trapped ions, cluster state

中图分类号: (Cavity quantum electrodynamics; micromasers)

42.50.Pq

03.67.Lx (Quantum computation architectures and implementations) 03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements)

郑小娟, 徐慧, 方卯发, 朱开成. Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system[J]. 中国物理B, 2010, 19(3): 34207-034207.

Zheng Xiao-Juan (郑小娟), Xu Hui(徐慧), Fang Mao-Fa(方卯发), and Zhu Kai-Cheng(朱开成). Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system[J]. Chin. Phys. B, 2010, 19(3): 34207-034207.

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Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system

Preparation of the four-qubit cluster states in cavity QED and the trapped-ion system

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