Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity

doi:10.1088/1674-1056/23/2/020311

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 20311-020311.doi: 10.1088/1674-1056/23/2/020311

Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity

刘欣^a, 廖庆洪^b, 方光宇^a, 王月媛^c, 刘树田^a

a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China;
c Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China

收稿日期:2013-04-26 修回日期:2013-07-22 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2013CBA01702).

Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity

Liu Xin (刘欣)^a, Liao Qing-Hong (廖庆洪)^b, Fang Guang-Yu (方光宇)^a, Wang Yue-Yuan (王月媛)^c, Liu Shu-Tian (刘树田)^a

a Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
b Department of Electronic Information Engineering, Nanchang University, Nanchang 330031, China;
c Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China

Received:2013-04-26 Revised:2013-07-22 Online:2013-12-12 Published:2013-12-12
Contact: Liu Shu-Tian E-mail:stliu@hit.edu.cn
About author:03.65.Ud; 03.67.Lx; 85.25.Cp
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2013CBA01702).

摘要/Abstract

摘要： A scheme is proposed to generate GHZ state and realize quantum phase gate for superconducting qubits placed in a microwave cavity. This scheme uses resonant interaction between the qubits and the cavity mode, so that the interaction time is short, which is important in view of decoherence. In particular, the phase gate can be realized simply with a single interaction between the qubits and the cavity mode. With cavity decay being considered, the fidelity and success probability are both very close to unity.

关键词: superconducting qubits, GHZ state, phase gate

Abstract: A scheme is proposed to generate GHZ state and realize quantum phase gate for superconducting qubits placed in a microwave cavity. This scheme uses resonant interaction between the qubits and the cavity mode, so that the interaction time is short, which is important in view of decoherence. In particular, the phase gate can be realized simply with a single interaction between the qubits and the cavity mode. With cavity decay being considered, the fidelity and success probability are both very close to unity.

Key words: superconducting qubits, GHZ state, phase gate

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.Lx (Quantum computation architectures and implementations) 85.25.Cp (Josephson devices)

刘欣, 廖庆洪, 方光宇, 王月媛, 刘树田. Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity[J]. 中国物理B, 2014, 23(2): 20311-020311.

Liu Xin (刘欣), Liao Qing-Hong (廖庆洪), Fang Guang-Yu (方光宇), Wang Yue-Yuan (王月媛), Liu Shu-Tian (刘树田). Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity[J]. Chin. Phys. B, 2014, 23(2): 20311-020311.

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Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity

Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity

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