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Influence of a detuning and Kerr nonlinearity on atom-atom entanglement in a double two-photon Jaynes-Cummings model

机译:静脉静脉非线性对双重光子jaynes-cummings模型中原子原子缠结的影响

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In this paper, we have investigated the entanglement dynamics between two identical two-level atoms in the framework of two-photon double Jaynes-Cummings model taking into account the detuning between atoms and twice cavities frequencies and Kerr nonlinearities in both cavities. We have carried out the temporal dependence of the atom-atom negativity for Bell's initial entangled atomic states. The results show that these parameters have great impact on the amplitudes of the atom-atom entanglement oscillations and that presence of detuning and Kerr nonlinearity lead to stabilization of entanglement for all Bell-types initial atomic states. For a certain initial atomic entangled states, there is an entanglement sudden death effect between the two atoms. The detuning and Kerr medium in the cavities can prevent the undesirable entanglement sudden death from occurring.
机译:在本文中,我们研究了两种光子双jaynes-cummings模型框架中的两个相同的两级原子之间的缠结动态,考虑到原子和两次腔中的腔频率和kerr非线性之间的静脉曲张。 我们已经对贝尔的最初纠缠原子态进行了原子原子消极性的时间依赖。 结果表明,这些参数对原子原子缠结振荡的幅度产生了很大的影响,并且存在静脉和克尔非线性的存在导致所有铃铛类型初始原子状态的缠结稳定。 对于某个初始原子缠结状态,两个原子之间存在缠绕突然死亡效应。 腔内的静谐和克尔介质可以防止不希望的缠结发生的突然死亡。

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