Influence of Multi-Photon Process on Entanglement of Interacting System of the Qubit and Thermal Field |
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作者姓名: | 李伟军 李上宾 许晶波 |
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作者单位: | ZhejiangInstituteofModernPhysicsandDepartmentofPhysics,ZhejiangUniversity,Hangzhou310027 |
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摘 要: | 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-photonprocess 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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关 键 词: | 多光子过程 量子纠缠态 量子信息 量子通信 量子光学 稳定态 单模温度场 相脱散 |
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