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Multiplicative chaos and the characteristic polynomial of the CUE: the \(L^1\)-phase. (English) Zbl 1441.60008

Summary: In this article we prove that suitable positive powers of the absolute value of the characteristic polynomial of a Haar distributed random unitary matrix converge in law, as the size of the matrix tends to infinity, to a Gaussian multiplicative chaos measure once correctly normalized. We prove this in the whole \(L^1\)- or subcritical phase of the chaos measure.

MSC:

60B20 Random matrices (probabilistic aspects)
15B05 Toeplitz, Cauchy, and related matrices
60G57 Random measures

References:

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