Asymptotics of determinants with a rotation-invariant weight and discontinuities along circles
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Asymptotics of determinants with a rotation-invariant weight and discontinuities along circles. / Charlier, Christophe.
In: Advances in Mathematics, Vol. 408, 108600, 2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Asymptotics of determinants with a rotation-invariant weight and discontinuities along circles
AU - Charlier, Christophe
N1 - Publisher Copyright: © 2022 The Author(s)
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - Asymptotic analysis
KW - Moment generating functions
KW - Planar Fisher-Hartwig singularities
KW - Random matrix theory
UR - http://www.scopus.com/inward/record.url?scp=85135073354&partnerID=8YFLogxK
U2 - 10.1016/j.aim.2022.108600
DO - 10.1016/j.aim.2022.108600
M3 - Journal article
AN - SCOPUS:85135073354
VL - 408
JO - Advances in Mathematics
JF - Advances in Mathematics
SN - 0001-8708
M1 - 108600
ER -
ID: 316821663