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arXiv 2609.37738math-phhep-phmath.MP

打破辛对称情形下非对角散射矩阵元分布的自旋简并性

Breaking the Spin Degeneracy for Distributions of Off-Diagonal Scattering Matrix Elements in the Case of Symplectic Symmetry

  • Universität Duisburg–Essen(杜伊斯堡-埃森大学)

机构由 AI 辅助整理,请以论文原文为准。

Nils Gluth, Thomas Guhr

AI总结:

本文提出一种在通道中引入自旋偏好以打破散射矩阵元分布自旋简并性的模型,借助超对称推导非线性sigma模型,精确计算一阶修正下的分布,发现实部和虚部在打破简并后仍与未打破时相同。

AI中文摘要:

最近推导出的散射矩阵元分布的精确表达式表明,所有入射和出射自旋取向的组合都是等概率分布的。我们提出了一个适合实验实现的模型,通过在通道中引入自旋偏好来打破这种简并性。借助超对称方法,我们推导出相应的非线性sigma模型。我们精确计算了测量偏好参数的一阶修正下实部和虚部的分布。值得注意的是,虽然打破自旋简并性导致受偏好的自旋取向和不受偏好的自旋取向具有不同的分布,但这些改变后的分布的实部和虚部与未打破自旋简并性时的情形相同。

英文摘要:

Recently derived exact expressions for the distributions of scattering matrix elements show that all combinations of ingoing and outgoing spin orientations are equally distributed. We propose a model suitable for experimental realization that breaks this degeneracy by introducing a spin preference in the channels. With the help of supersymmetry we derive a corresponding nonlinear sigma model. We exactly calculate the distributions of real and imaginary part in first order of the parameter measuring the preference. Quite remarkably, while breaking the spin degeneracy leads to different distributions for the favored and unfavored spin orientation, the real and imaginary parts of these altered distributions are the same as in the case of unbroken spin degeneracy.

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