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arXiv 2104.06157math.PRmath.OA
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复Wigner矩阵的对角自由度和整体涨落

Freeness over the diagonal and global fluctuations of complex Wigner matrices

Camille Male

摘要:

我们的特点是有限的二阶分布的某些独立的复杂的维格纳和确定性矩阵使用Voiculescu的概念的自由度的对角线。如果维格纳矩阵是高斯的,那么Mingo和Speicher的二阶自由度的概念给出了一个通用规则,即边际一阶和二阶分布。我们适应和重新制定这一概念的算子值随机变量在二阶概率空间。假设Wigner矩阵是置换不变的,伪方差为零,而确定性矩阵满足一个限制性质

英文摘要:

We characterize the limiting second order distributions of certain independent complex Wigner and deterministic matrices using Voiculescu's notions of freeness over the diagonal. If the Wigner matrices are Gaussian, Mingo and Speicher's notion of second order freeness gives a universal rule, in terms of marginal first and second order distribution. We adapt and reformulate this notion for operator-valued random variables in a second order probability space. The Wigner matrices are assumed to be permutation invariant with null pseudo variance and the deterministic matrices to satisfy a restrictive property

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