English

Large gap asymptotics on annuli in the random normal matrix model

Mathematical Physics 2023-02-14 v3 math.MP Probability

Abstract

We consider a two-dimensional determinantal point process arising in the random normal matrix model and which is a two-parameter generalization of the complex Ginibre point process. In this paper, we prove that the probability that no points lie on any number of annuli centered at 00 satisfies large nn asymptotics of the form \begin{align*} \exp \bigg( C_{1} n^{2} + C_{2} n \log n + C_{3} n + C_{4} \sqrt{n} + C_{5}\log n + C_{6} + \mathcal{F}_{n} + \mathcal{O}\big( n^{-\frac{1}{12}}\big)\bigg), \end{align*} where nn is the number of points of the process. We determine the constants C1,,C6C_{1},\ldots,C_{6} explicitly, as well as the oscillatory term Fn\mathcal{F}_{n} which is of order 11. We also allow one annulus to be a disk, and one annulus to be unbounded. For the complex Ginibre point process, we improve on the best known results: (i) when the hole region is a disk, only C1,,C4C_{1},\ldots,C_{4} were previously known, (ii) when the hole region is an unbounded annulus, only C1,C2,C3C_{1},C_{2},C_{3} were previously known, and (iii) when the hole region is a regular annulus in the bulk, only C1C_{1} was previously known. For general values of our parameters, even C1C_{1} is new. A main discovery of this work is that Fn\mathcal{F}_{n} is given in terms of the Jacobi theta function. As far as we know this is the first time this function appears in a large gap problem of a two-dimensional point process.

Cite

@article{arxiv.2110.06908,
  title  = {Large gap asymptotics on annuli in the random normal matrix model},
  author = {Christophe Charlier},
  journal= {arXiv preprint arXiv:2110.06908},
  year   = {2023}
}

Comments

52 pages, 4 figures. This version is more detailed than the published version

R2 v1 2026-06-24T06:52:04.403Z