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# Mathematical Physics

# Title: Large gap asymptotics on annuli in the random normal matrix model

(Submitted on 13 Oct 2021 (v1), last revised 24 Oct 2021 (this version, v2))

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 $0$ satisfies large $n$ 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 $n$ is the number of points of the process. We determine the constants $C_{1},\ldots,C_{6}$ explicitly, as well as the oscillatory term $\mathcal{F}_{n}$ which is of order $1$. 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: when the hole region is a disk, only the constants $C_{1},\ldots,C_{4}$ were previously known, and when the hole region is an annulus, only $C_{1}$ was previously known. For general values of our parameters, even $C_{1}$ is new. A main discovery of this work is that $\mathcal{F}_{n}$ 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.

## Submission history

From: Christophe Charlier [view email]**[v1]**Wed, 13 Oct 2021 17:44:41 GMT (1506kb,D)

**[v2]**Sun, 24 Oct 2021 12:38:30 GMT (1507kb,D)

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