Asymptotic Eigenvalue Distributions of Block-Transposed Wishart Matrices

Asymptotic Eigenvalue Distributions of Block-Transposed Wishart Matrices
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块转置 Wishart 矩阵的渐近特征值分布

DOI:
10.1007/s10959-012-0409-4
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发表时间:
2011
影响因子:
0.8
通讯作者:
I. Nechita
I. Nechita
中科院分区:
数学4区
文献类型:
--
作者:
T. Banica;I. Nechita

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研究了参数(dn,dm)的Wishart矩阵W∈Mdn()的偏置WΓ=(id⊗t)W∈Mdn()。我们的主要结果是,当d→∞时,mWΓ定律是参数m(n±1)/2的自由泊松定律的自由差。在量子信息论问题的激励下,我们还推导了这些测度在正半线上被支持的充分必要条件。
We study the partial transposition WΓ=(id⊗t)W∈Mdn(ℂ) of a Wishart matrix W∈Mdn(ℂ) of parameters (dn,dm). Our main result is that, with d→∞, the law of mWΓ is a free difference of free Poisson laws of parameters m(n±1)/2. Motivated by questions in quantum information theory, we also derive necessary and sufficient conditions for these measures to be supported on the positive half-line.