Kerr nonlinear coupler and entanglement
Kerr nonlinear coupler and entanglement
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DOI：
10.1088/1464-4266/6/3/007
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发表时间：
2004-03-01
期刊：
影响因子：
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通讯作者：
Miranowicz, A
中科院分区：
文献类型：
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作者：
Leonski, W;Miranowicz, A
本文讨论了一个由两个耦合非线性振子（类克尔非线性耦合器）组成的模型，其中一个振子由外部相干激发泵浦。应用非线性量子剪刀方法，我们证明了耦合器的量子演化可以封闭在有限个n光子Fock态的集合内。此外，我们表明，该系统是能够产生钟状态，因此，所讨论的耦合器的行为作为一个两量子比特系统。我们还分析了耗散对共存参数化的队形纠缠的影响。
We discuss a model comprising two coupled nonlinear oscillators (Kerr-like nonlinear coupler) with one of them pumped by an external coherent excitation. Applying the method of nonlinear quantum scissors we show that the quantum evolution of the coupler can be closed within a finite set of n-photon Fock states. Moreover, we show that the system is able to generate Bell-like states and, as a consequence, the coupler discussed behaves as a two-qubit system. We also analyse the effects of dissipation on entanglement of formation parametrized by concurrence.