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arXiv quant-ph/0506240quant-ph
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角EPR悖论

Angular EPR paradox

Joerg B Goette, Sonja Franke-Arnold, Stephen M. Barnett

摘要:

局域测不准关系的破坏是探测纠缠的一个重要工具,特别是在多维系统中。光的轨道角动量提供了这样一个多维系统。研究了轨道角动量和轨道角位置共轭变量的量子关联。我们确定了一个实验上可检验的标准演示的角度版本的EPR悖论。为了解释未来的实验结果,从我们提出的设置,我们包括一个模型的角度位置测量固有的不确定性。对于这种测量,使用角孔径来确定角度的概率密度。我们表明,对于一类孔径函数的演示的角度EPR悖论,根据我们的标准,是预期的。

英文摘要:

The violation of local uncertainty relations is a valuable tool for detecting entanglement, especially in multi-dimensional systems. The orbital angular momentum of light provides such a multi-dimensional system. We study quantum correlations for the conjugate variables of orbital angular momentum and angular position. We determine an experimentally testable criterion for the demonstration of an angular version of the EPR paradox. For the interpretation of future experimental results from our proposed setup, we include a model for the indeterminacies inherent to the angular position measurement. For this measurement angular apertures are used to determine the probability density of the angle. We show that for a class of aperture functions a demonstration of an angular EPR paradox, according to our criterion, is to be expected.

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