arXiv 0909.25142009-09-14quant-ph

相敏高斯态光的非局域色散抵消

Nonlocal dispersion cancellation with phase-sensitive Gaussian-state light

Jeffrey H. Shapiro

备注：: 9 pages, 1 figure
DOI：: 10.1103/PhysRevA.81.023824

摘要：

Franson的非局部色散抵消范例[J. D. Franson，Phys.Rev.A { \bf 45，} 3126（1992）]使用两种具有相敏互相关的联合高斯态信号和参考光束进行了研究。第一个联合信号参考状态是非经典的，具有处于量子力学极限的相敏互相关。它模拟从连续波自发参量下转换获得的输出。第二个联合信号参考状态是经典的-它有一个适当的$P$表示-具有相位敏感的互相关，它处于经典物理学设定的极限。使用这些状态，我们表明，一个版本的弗兰森的非局域色散抵消配置具有基本相同的量子和经典的解释\em除了RM的对比度，这是高得多的量子情况下比它是在经典的情况下。这一工作与Franson最近的论文[J.D. Franson，arXiv：0907：5196 [quant-ph]]，该论文断言，对于量子非局域色散抵消中的所有特征，都没有经典的解释。

英文摘要：

Franson's paradigm for nonlocal dispersion cancellation [J. D. Franson, Phys. Rev. A {\bf 45,} 3126 (1992)] is studied using two kinds of jointly Gaussian-state signal and reference beams with phase-sensitive cross correlations. The first joint signal-reference state is nonclassical, with a phase-sensitive cross correlation that is at the ultimate quantum-mechanical limit. It models the outputs obtained from continuous-wave spontaneous parametric downconversion. The second joint signal-reference state is classical---it has a proper $P$ representation---with a phase-sensitive cross correlation that is at the limit set by classical physics. Using these states we show that a version of Franson's nonlocal dispersion cancellation configuration has essentially identical quantum and classical explanations \em except rm for the contrast obtained, which is much higher in the quantum case than it is in the classical case. This work bears on Franson's recent paper [J. D. Franson, arXiv:0907:5196 [quant-ph]], which asserts that there is no classical explanation for all the features seen in quantum nonlocal dispersion cancellation.

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