Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field

doi:10.1088/1674-1056/19/11/110310

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 110310-110501.doi: 10.1088/1674-1056/19/11/110310

Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field

钟文学, 程广玲, 陈爱喜

Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China

收稿日期:2009-10-14 修回日期:2010-07-01 出版日期:2010-11-15 发布日期:2010-11-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2005CB724508), the Scientific Research Foundation of Jiangxi Provincial Department of Education, China (Grant No. GJJ10133), and the Foundation of Talent of Jinggang of Jiangxi Province, China (Grant No. 2008DQ00400).

Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field

Zhong Wen-Xue(钟文学), Cheng Guang-Ling(程广玲)^†, and Chen Ai-Xi(陈爱喜)

Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China

Received:2009-10-14 Revised:2010-07-01 Online:2010-11-15 Published:2010-11-15
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2005CB724508), the Scientific Research Foundation of Jiangxi Provincial Department of Education, China (Grant No. GJJ10133), and the Foundation of Talent of Jinggang of Jiangxi Province, China (Grant No. 2008DQ00400).

摘要/Abstract

摘要： We present an alternative scheme for implementing the unconventional geometric two-qubit phase gate and preparing multiqubit entanglement by using a frequency-modulated laser field to simultaneously illuminate all ions. Selecting the index of modulation yields selective mechanisms for coupling and decoupling between the internal and the external states of the ions. By the selective mechanisms, we obtain the unconventional geometric two-qubit phase gate, multiparticle Greenberger--Horne--Zeilinger states and highly entangled cluster states. Our scheme is insensitive to the thermal motion of the ions.

Abstract: We present an alternative scheme for implementing the unconventional geometric two-qubit phase gate and preparing multiqubit entanglement by using a frequency-modulated laser field to simultaneously illuminate all ions. Selecting the index of modulation yields selective mechanisms for coupling and decoupling between the internal and the external states of the ions. By the selective mechanisms, we obtain the unconventional geometric two-qubit phase gate, multiparticle Greenberger–Horne–Zeilinger states and highly entangled cluster states. Our scheme is insensitive to the thermal motion of the ions.

Key words: a frequency-modulated field, unconventional geometric phase gate, Greenberger–Horne–Zeilinger states, cluster states

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.Lx (Quantum computation architectures and implementations) 42.50.Dv (Quantum state engineering and measurements) 42.60.Fc (Modulation, tuning, and mode locking)

钟文学, 程广玲, 陈爱喜. Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field[J]. 中国物理B, 2010, 19(11): 110310-110501.

Zhong Wen-Xue(钟文学), Cheng Guang-Ling(程广玲), and Chen Ai-Xi(陈爱喜). Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field[J]. Chin. Phys. B, 2010, 19(11): 110310-110501.

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Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field

Unconventional geometric phase gate and multiqubit entanglement for hot ions with a frequency-modulated field

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