Top eigenvalue of a random matrix: large deviations and third order phase transition
We study the fluctuations of the largest eigenvalue λ max of N× N random matrices in the
limit of large N. The main focus is on Gaussian β ensembles, including in particular the …
limit of large N. The main focus is on Gaussian β ensembles, including in particular the …
The wasteland of random supergravities
A bstract We show that in a general\(\mathcal {N}={1}\) supergravity with N≫ 1 scalar fields,
an exponentially small fraction of the de Sitter critical points are metastable vacua. Taking …
an exponentially small fraction of the de Sitter critical points are metastable vacua. Taking …
Coulumb fluid, Painlevé transcendents, and the information theory of MIMO systems
In this paper, we compute two important information-theoretic quantities which arise in the
application of multiple-input multiple-output (MIMO) antenna wireless communication …
application of multiple-input multiple-output (MIMO) antenna wireless communication …
A unified theory of quantum neural network loss landscapes
ER Anschuetz - arxiv preprint arxiv:2408.11901, 2024 - arxiv.org
Classical neural networks with random initialization famously behave as Gaussian
processes in the limit of many neurons, which allows one to completely characterize their …
processes in the limit of many neurons, which allows one to completely characterize their …
How many eigenvalues of a Gaussian random matrix are positive?
We study the probability distribution of the index N+, ie, the number of positive eigenvalues
of an N× N Gaussian random matrix. We show analytically that, for large N and large N+ with …
of an N× N Gaussian random matrix. We show analytically that, for large N and large N+ with …
Free energy expansions of a conditional GinUE and large deviations of the smallest eigenvalue of the LUE
SS Byun, SM Seo, M Yang - arxiv preprint arxiv:2402.18983, 2024 - arxiv.org
We consider a planar Coulomb gas ensemble of size $ N $ with the inverse temperature
$\beta= 2$ and external potential $ Q (z)=| z|^ 2-2c\log| za| $, where $ c> 0$ and …
$\beta= 2$ and external potential $ Q (z)=| z|^ 2-2c\log| za| $, where $ c> 0$ and …
Random matrix ensemble for the covariance matrix of Ornstein-Uhlenbeck processes with heterogeneous temperatures
We introduce a random matrix model for the stationary covariance of multivariate Ornstein-
Uhlenbeck processes with heterogeneous temperatures, where the covariance is …
Uhlenbeck processes with heterogeneous temperatures, where the covariance is …
Recursion scheme for the largest-Wishart–Laguerre eigenvalue and Landauer conductance in quantum transport
The largest eigenvalue distribution of the Wishart–Laguerre ensemble, indexed by Dyson
parameter and Laguerre parameter a, is fundamental in multivariate statistics and finds …
parameter and Laguerre parameter a, is fundamental in multivariate statistics and finds …
Top eigenvalue statistics of diluted Wishart matrices
Using the replica method, we compute analytically the average largest eigenvalue of diluted
covariance matrices of the form $\mathbf {J}=\mathbf {X}^ T\mathbf {X} $, where $\mathbf {X} …
covariance matrices of the form $\mathbf {J}=\mathbf {X}^ T\mathbf {X} $, where $\mathbf {X} …
Optimization landscape in the simplest constrained random least-square problem
YV Fyodorov, R Tublin - Journal of Physics A: Mathematical and …, 2022 - iopscience.iop.org
We analyze statistical features of the'optimization landscape'in a random version of one of
the simplest constrained optimization problems of the least-square type: finding the best …
the simplest constrained optimization problems of the least-square type: finding the best …