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Influence of Multi-Photon Process on Entanglement of Interacting System of the Qubit and Thermal Field |
| LI Wei-Jun;LI Shang-Bin;XU Jing-Bo |
| Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027 |
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| Cite this article: |
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LI Wei-Jun, LI Shang-Bin, XU Jing-Bo 2004 Chin. Phys. Lett. 21 774-777 |
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Abstract We study the system of a single qubit couples to a single mode thermal field according to a multi-photon Jaynes-Cummings-type interaction with phase decoherence. Both the time evolving entanglement and the stationary state entanglement are calculated by adopting the log-negativity as a measure. It is found that the multi-photon process can enhance the stationary state entanglement of this system and can enlarge the range of the parameter Δ/g and the mean photon number of initial thermal field in which the stationary state is distillable.
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| Keywords:
03.67.-a
03.65.Ud
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Published: 01 May 2004
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| PACS: |
03.67.-a
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(Quantum information)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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