ENTANGLED COHERENT STATES
ENTANGLED COHERENT STATES
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DOI：
10.1103/physreva.45.6811
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发表时间：
1992-05-01
影响因子：
2.9
通讯作者：
SANDERS, BC
中科院分区：
文献类型：
--
作者：
SANDERS, BC
非线性马赫-曾德尔干涉仪作为一种设备，使一对相干态可以转换成纠缠叠加的相干态的纠缠的概念被推广到包括非正交的，但不同的，组件状态。每种模式被引导到零差检测器。我们表明，存在非经典的强度相关的零差探测器的输出端口，便于本地现实主义的测试。与以前测试局部实在性的光学方案不同，这里使用的初始状态具有正的Glauber-Sudarshan表示，因此是半经典状态。非线性本身就是产生非经典态的原因。
The nonlinear Mach-Zehnder interferometer is presented as a device whereby a pair of coherent states can be transformed into an entangled superposition of coherent states for which the notion of entanglement is generalized to include nonorthogonal, but distinct, component states. Each mode is directed to a homodyne detector. We show that there exist nonclassical intensity correlations at the output ports of the homodyne detectors which facilitate a test of local realism. In contradistinction to previous optical schemes which test local realism, the initial state used here possesses a positive Glauber-Sudarshan representation and is therefore a semiclassical state. The nonlinearity itself is responsible for generating the nonclassical state.