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Entanglement of Two-Superconducting-Qubit System Coupled with a Fixed Capacitor |
| TIAN Li-Jun1,2**, QIN Li-Guo1,2, ZHANG Hong-Biao3
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1Department of Physics, Shanghai University, Shanghai 200444
2Shanghai Key Lab for Astrophysics, Shanghai 200234
3Institute of Theoretical Physics, Northeast Normal University, Changchun 130024
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| Cite this article: |
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TIAN Li-Jun, QIN Li-Guo, ZHANG Hong-Biao 2011 Chin. Phys. Lett. 28 050308 |
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Abstract We study thermal entanglement in a two-superconducting-qubit system in two cases, either identical or distinct. By calculating the concurrence of system, we find that the entangled degree of the system is greatly enhanced in the case of very low temperature and Josephson energies for the identical superconducting qubits and our result is in a good agreement with the experimental data.
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| Keywords:
03.65.Ud
74.81.-g
74.50.+r
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Received: 09 September 2010
Published: 26 April 2011
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| PACS: |
03.65.Ud
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(Entanglement and quantum nonlocality)
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74.81.-g
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(Inhomogeneous superconductors and superconducting systems, including electronic inhomogeneities)
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74.50.+r
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(Tunneling phenomena; Josephson effects)
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