Freeness of type $B$ and conditional freeness for random matrices

التفاصيل البيبلوغرافية
العنوان: Freeness of type $B$ and conditional freeness for random matrices
المؤلفون: Cébron, Guillaume, Dahlqvist, Antoine, Gabriel, Franck
سنة النشر: 2022
المجموعة: Mathematics
مصطلحات موضوعية: Mathematics - Probability, Mathematics - Operator Algebras
الوصف: The asymptotic freeness of independent unitarily invariant $N\times N$ random matrices holds in expectation up to $O(N^{-2})$. An already known consequence is the infinitesimal freeness in expectation. We put in evidence another consequence for unitarily invariant random matrices: the almost sure asymptotic freeness of type $B$. As byproducts, we recover the asymptotic cyclic monotonicity, and we get the asymptotic conditional freeness. In particular, the eigenvector empirical spectral distribution of the sum of two randomly rotated random matrices converges towards the conditionally free convolution. We also show new connections between infinitesimal freeness, freeness of type $B$, conditional freeness, cyclic monotonicity and monotone independence. Finally, we show rigorously that the BBP phase transition for an additive rank-one perturbation of a GUE matrix is a consequence of the asymptotic conditional freeness, and the arguments extend to the study of the outlier eigenvalues of other unitarily invariant ensembles.
نوع الوثيقة: Working Paper
URL الوصول: http://arxiv.org/abs/2205.01926
رقم الأكسشن: edsarx.2205.01926
قاعدة البيانات: arXiv