Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators

doi:10.1088/1674-1056/17/2/013

中国物理B ›› 2008, Vol. 17 ›› Issue (2): 424-430.doi: 10.1088/1674-1056/17/2/013

Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators

张英俏¹, 张寿¹, 金星日²

(1)Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China;Department of Physics, College of Science, Yanbian University, Yanji 133002, China; (2)Department of Physics, College of Science, Yanbian University, Yanji 133002, China

收稿日期:2007-04-11 修回日期:2007-07-03 出版日期:2008-02-20 发布日期:2008-02-20
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No 60667001) and the Science Foundation of Yanbian University in China (Grant No 2007-31).

Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators

Zhang Ying-Qiao(张英俏)^a)b)†, Jin Xing-Ri(金星日)^b), and Zhang Shou(张寿)^a)b)‡

^a Center for the Condensed-Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China; ^bDepartment of Physics, College of Science, Yanbian University, Yanji 133002, China

Received:2007-04-11 Revised:2007-07-03 Online:2008-02-20 Published:2008-02-20
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No 60667001) and the Science Foundation of Yanbian University in China (Grant No 2007-31).

摘要/Abstract

摘要： Based on squeezed operators this paper has implemented an ideal unconventional geometric quantum gate (GQG) in ion trap-optical cavity system by radiating the trapped ions with the cavity field of frequency $\omega_c}$ and an external laser field of frequency $\omega_L}$. It can ensure that the gate time is shorter than the coherence time for qubits and the decay time of the optical cavity by appropriately tuning the ionic transition frequency $\omega_{0}$, the frequencies of the cavity mode $\omega_c}$ and the vibrational mode $\nu$. It has also realized the unconventional GQG under the influence of the cavity decay based on the squeezed-like operators and found that the present scheme works well for the smaller cavity decay by investigating the corresponding fidelity and success probability.

关键词: quantum phase gates, squeezed operators, trapped ions

Abstract: Based on squeezed operators this paper has implemented an ideal unconventional geometric quantum gate (GQG) in ion trap-optical cavity system by radiating the trapped ions with the cavity field of frequency $\omega_{\rm c}$ and an external laser field of frequency $\omega_{\rm L}$. It can ensure that the gate time is shorter than the coherence time for qubits and the decay time of the optical cavity by appropriately tuning the ionic transition frequency $\omega_{0}$, the frequencies of the cavity mode $\omega_{\rm c}$ and the vibrational mode $\nu$. It has also realized the unconventional GQG under the influence of the cavity decay based on the squeezed-like operators and found that the present scheme works well for the smaller cavity decay by investigating the corresponding fidelity and success probability.

Key words: quantum phase gates, squeezed operators, trapped ions

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

03.67.Lx

42.50.Dv (Quantum state engineering and measurements) 42.50.Pq (Cavity quantum electrodynamics; micromasers)

张英俏, 金星日, 张寿. Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators[J]. 中国物理B, 2008, 17(2): 424-430.

Zhang Ying-Qiao(张英俏), Jin Xing-Ri(金星日), and Zhang Shou(张寿). Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators[J]. Chin. Phys. B, 2008, 17(2): 424-430.

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Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators

Generation of unconventional geometric phase gates in ion trap-optical cavity system by squeezed operators

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