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arXiv math-ph/0408019math-phcond-mat.dis-nnmath.MP
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自由酉随机矩阵的加法

Addition of Free Unitary Random Matrices

Andrzej T. Goerlich, Andrzej Jarosz

摘要:

本文考虑一类新的非厄米特随机矩阵,即具有包含酉矩阵的自由独立项和形式的非厄米特随机矩阵。为了处理它们,我们利用最近发展的四元数技术。在导出了描述酉矩阵可加性的一般恒等式后,我们求解了三个特殊的模型:CUE + CUE,CUE+…加上CUE(i. e.任意数量的CUE矩阵的和),以及CUE加GUE。通过求解一个给定的模型,我们在这里的意思是计算特征值的二维区域的边界,以及区域内的特征值的密度函数。我们确认数字的所有结果,获得非常好的协议。

英文摘要:

We consider a new class of non-Hermitian random matrices, namely the ones which have the form of sums of freely independent terms involving unitary matrices. To deal with them, we exploit the recently developed quaternion technique. After having derived some general identities describing additive properties of unitary matrices, we solve three particular models: CUE plus CUE, CUE plus... plus CUE (i. e. the sum of an arbitrary number of CUE matrices), and CUE plus GUE. By solution of a given model we mean here to calculate the borderline of the eigenvalues' two-dimensional domain, as well as the eigenvalues' density function inside the domain. We confirm numerically all the results, obtaining very good agreement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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