Asymptotics of determinants with a rotation-invariant weight and discontinuities along circles
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We study the moment generating function of the disk counting statistics of a two-dimensional determinantal point process which generalizes the complex Ginibre point process. This moment generating function involves an n×n determinant whose weight is supported on the whole complex plane, is rotation-invariant, and has discontinuities along circles centered at 0. These discontinuities can be thought of as a two-dimensional analogue of jump-type Fisher-Hartwig singularities. In this paper, we obtain large n asymptotics for this determinant, up to and including the term of order [Formula presented]. We allow for any finite number of discontinuities in the bulk, one discontinuity at the edge, and any finite number of discontinuities bounded away from the bulk. As an application, we obtain the large n asymptotics of all the cumulants of the disk counting function up to and including the term of order [Formula presented], both in the bulk and at the edge. This improves on the best known results for the complex Ginibre point process, and for general values of our parameters these results are completely new. Our proof makes a novel use of the uniform asymptotics of the incomplete gamma function.
Originalsprog | Engelsk |
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Artikelnummer | 108600 |
Tidsskrift | Advances in Mathematics |
Vol/bind | 408 |
ISSN | 0001-8708 |
DOI | |
Status | Udgivet - 2022 |
Bibliografisk note
Funding Information:
The author is grateful to Peter Forrester, Arno Kuijlaars, Grégory Schehr and Nick Simm for useful comments. The author acknowledges support from the European Research Council , Grant Agreement No. 682537 , the Swedish Research Council , Grant No. 2015-05430 , the Ruth and Nils-Erik Stenbäck Foundation , and the Novo Nordisk Fonden Project, Grant 0064428 .
Publisher Copyright:
© 2022 The Author(s)
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