English

Random anti-commuting Hermitian matrices

Probability 2023-12-25 v1

Abstract

We consider pairs of anti-commuting 2p2p-by-2p2p Hermitian matrices that are chosen randomly with respect to a Gaussian measure. Generically such a pair decomposes into the direct sum of 22-by-22 blocks on which the first matrix has eigenvalues ±xj\pm x_j and the second has eigenvalues ±yj\pm y_j. We call {(xj,yj)}\{ (x_j, y_j) \} the skew spectrum of the pair. We derive a formula for the probability density of the skew spectrum, and show that the elements are repelling.

Keywords

Cite

@article{arxiv.2312.14330,
  title  = {Random anti-commuting Hermitian matrices},
  author = {John E. McCarthy and Hazel T. McCarthy},
  journal= {arXiv preprint arXiv:2312.14330},
  year   = {2023}
}
R2 v1 2026-06-28T13:59:21.184Z