Einstein–Podolsky–Rosen entanglement via nonlinear processes enhanced by electromagnetically induced transparency
Einstein–Podolsky–Rosen entanglement via nonlinear processes enhanced by electromagnetically induced transparency
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DOI：
10.1088/0953-4075/42/19/195503
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发表时间：
2009-09
期刊：
影响因子：
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通讯作者：
Guang-ling Cheng;Xiangming Hu;Wenxue Zhong
中科院分区：
文献类型：
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作者：
Guang-ling Cheng;Xiangming Hu;Wenxue Zhong
我们证明了Einstein-Podolsky-罗森（EPR）光纠缠可以通过电磁感应透明增强的共振非线性相互作用获得。一个三能级系统被用作一个统一的模型，其中两个亚稳态通过微波，或拉曼，或双光子跃迁相互耦合，和上亚稳态耦合到激发态。一对内边带通过从激发态到另一个亚稳态的跃迁被放大为光腔模。分析采用缀饰原子压缩变换模方法。当外加场的振幅比适当时，两个类EPR算符的方差之和趋于零，这对应于EPR纠缠。
We show that Einstein–Podolsky–Rosen (EPR) light entanglement is obtainable via the resonant nonlinear interactions enhanced by electromagnetically induced transparency. A three-level system is used as a unified model, where two metastable states are coupled to each other via microwave, or Raman, or two-photon transition, and the upper metastable state is coupled to the excited state. A pair of inner sidebands is amplified as optical cavity modes via the transition from the excited state to the other metastable state. The analysis is presented by using the dressed-atom squeezed-transformed-mode approach. For a proper ratio of the amplitudes of the applied fields, the sum of the variances for two EPR-like operators approaches zero, which corresponds to EPR entanglement.