Resonant interaction scheme for GHZ state preparation and quantum phase gate with superconducting qubits in a cavity |
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| Authors: | Liu Xin Liao Qing-Hong Fang Guang-Yu Wang Yue-Yuan Liu Shu-Tian |
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| Institution: | 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 |
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| 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. |
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| Keywords: | superconducting qubits GHZ state phase gate |
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