Mathematical Physics
[Submitted on 31 Oct 2018 (v1), last revised 26 Jun 2019 (this version, v2)]
Title:A representation of joint moments of CUE characteristic polynomials in terms of Painleve functions
View PDFAbstract:We establish a representation of the joint moments of the characteristic polynomial of a CUE random matrix and its derivative in terms of a solution of the sigma-Painleve V equation. The derivation involves the analysis of a formula for the joint moments in terms of a determinant of generalised Laguerre polynomials using the Riemann-Hilbert method. We use this connection with the sigma-Painleve V equation to derive explicit formulae for the joint moments and to show that in the large-matrix limit the joint moments are related to a solution of the sigma-Painleve III equation. Using the conformal block expansion of the tau-functions associated with the sigma-Painleve V and the sigma-Painleve III equations leads to general conjectures for the joint moments.
Submission history
From: Robert Buckingham [view email][v1] Wed, 31 Oct 2018 18:57:46 UTC (41 KB)
[v2] Wed, 26 Jun 2019 22:58:10 UTC (43 KB)
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