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Control of the Entanglement between Two Josephson Charge Qubits |
| LIAO Qing-Hong1, FANG Guang-Yu1, WANG Ji-Cheng1, AHMAD Muhammad Ashfaq2, LIU Shu-Tian1**
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1Department of Physics, Harbin Institute of Technology, Harbin 150001
2Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan |
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| Cite this article: |
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LIAO Qing-Hong, FANG Guang-Yu, WANG Ji-Cheng et al 2011 Chin. Phys. Lett. 28 060307 |
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Abstract 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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03.67.Bg
85.25.Cp
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Received: 12 December 2010
Published: 29 May 2011
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| PACS: |
03.67.Bg
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(Entanglement production and manipulation)
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85.25.Cp
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(Josephson devices)
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