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首页> 外文期刊>Journal of physics, A. Mathematical and theoretical >Quadrature uncertainty and information entropy of quantum elliptical vortex states
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Quadrature uncertainty and information entropy of quantum elliptical vortex states

机译:量子椭圆旋涡态的正交不确定性和信息熵

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We study the quadrature uncertainty of the quantum elliptical vortex state using the associated Wigner function. Deviations from the minimum uncertainty states were observed due to the absence of Gaussianity. We further observed that there exists an optimum value of ellipticity which gives rise to the maximum entanglement of the two modes of the quantum elliptical vortex states. In our study of entropy, we noticed that with increasing vorticity, entropy increases for both the modes. A further increase in ellipticity reduces the entropy thereby resulting in a loss of information carrying capacity. We check the validity of the entropic inequality relations, namely the subaddivity and the Araki-Lieb inequality. The latter was satisfied only for a very small range of the ellipticity of the vortex, while the former seemed to be valid at all values.
机译:我们使用相关的维格纳函数研究了量子椭圆涡旋态的正交不确定性。由于没有高斯性,观察到与最小不确定状态的偏差。我们进一步观察到,存在一个椭圆率的最佳值,该最优值会引起量子椭圆涡态的两种模式的最大纠缠。在我们的熵研究中,我们注意到随着涡度的增加,两种模式的熵都增加。椭圆度的进一步增加减小了熵,从而导致信息承载能力的损失。我们检查了熵不等式关系的有效性,即次可加性和Araki-Lieb不等式。后者仅在很小的涡度范围内得到满足,而前者似乎在所有值上都是有效的。

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