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Continuous-Variable Entanglement Transfer from Cavity Field to Two Mesoscopic Josephson Junctions |
| CHANG Ping;SHAO Bin;WANG Zhao-Ming;ZOU Jian |
| Department of Physics, Beijing Institute of Technology, Beijing 100081 |
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| Cite this article: |
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CHANG Ping, SHAO Bin, WANG Zhao-Ming et al 2008 Chin. Phys. Lett. 25 1098-1101 |
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Abstract We consider a composite system of two remote mesoscopic Josephson
junctions interacting locally with a two-mode non-classical cavity field and investigate entanglement transfer from a bipartite continuous-variable (CV) system to a pair of localized mesoscopic Josephson junctions. We obtain analytically the time-dependent characteristic functions in the Wigner representation for the two CV subsystems, where two cases are considered for the zero and finite temperatures. Furthermore, we analyse the influences of the temperature on the period recovery of the entanglement.
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74.50.+r
42.50.Dv
03.67.-a
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Received: 26 November 2007
Published: 27 February 2008
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| PACS: |
74.50.+r
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(Tunneling phenomena; Josephson effects)
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42.50.Dv
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(Quantum state engineering and measurements)
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03.67.-a
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(Quantum information)
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