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Stationary Entanglement of Two Charge Qubits Induced by a Damped and Driven Cavity |
| LI Jun-Gang;ZOU Jian;CAI Jin-Fang;SHAO Bin |
| Department of Physics, Beijing Institute of Technology, Beijing 100081 |
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| Cite this article: |
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LI Jun-Gang, ZOU Jian, CAI Jin-Fang et al 2006 Chin. Phys. Lett. 23 708-711 |
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Abstract Two charge qubits located inside a damped driven cavity is considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits is sensitive to the initial state of the qubits, but independent of the cavity field's initial state. The two qubits initially in the separable and most mixed state can be more easily entangled. The external field can be used to enhance the steady entanglement between the two charge qubits.
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| Keywords:
74.50.+r
03.65.Ud
03.67.-a
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Published: 01 March 2006
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| PACS: |
74.50.+r
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(Tunneling phenomena; Josephson effects)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.67.-a
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(Quantum information)
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