Control of the Entanglement between Two Josephson Charge Qubits

LIAO Qing-Hong; FANG Guang-Yu; WANG Ji-Cheng; AHMAD Muhammad Ashfaq; LIU Shu-Tian

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Control of the Entanglement between Two Josephson Charge Qubits

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@@ We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction.The time evolution of entanglement between two Josephson charge qubits is investigated by employing the concurrence.We examine the influence of the initial mean photon number, the relative phase and the amplitude of the two qubits on the time evolution of entanglement.The results show that the initial mean photon number, the relative phase and the amplitude of the two qubits play an important role in the evolution of entanglement.

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《中国物理快报：英文版》 |2011年第6期|52-55|共4页
作者
LIAO Qing-Hong; FANG Guang-Yu; WANG Ji-Cheng; AHMAD Muhammad Ashfaq; LIU Shu-Tian;
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Department of Physics, Harbin Institute of Technology, Harbin 150001;

Department of Physics, Harbin Institute of Technology, Harbin 150001;

Department of Physics, Harbin Institute of Technology, Harbin 150001;

Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan;

Department of Physics, Harbin Institute of Technology, Harbin 150001;

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Control of the Entanglement between Two Josephson Charge Qubits

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