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Moment bounds for Gaussian multiplicative chaos with higher-dimensional singularities

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arxiv 2302.06097 v1 pith:JEEDKYPA submitted 2023-02-13 math.PR math-phmath.MP

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keywords boundboundarychaosgaussianmultiplicativesingularitiesthresholdconformal
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We determine the exact threshold of the extended Seiberg bound for the existence of correlation functions in the boundary Liouville conformal field theory in the unit disk. In probabilistic terms, our result is a toolbox yielding the threshold for the existence of positive moments of Gaussian multiplicative chaos measure, appliable to the case where singularities of arbitrary (co-)dimension in the background metric are present. We improve previous results of this type for 0-dimensional singularities in [DKRV16] and a sufficient condition for the 1-dimensional singularity in an unpublished appendix of [HRV18]. In particular, we prove the optimality of the moment bound threshold for boundary Gaussian multiplicative chaos conjectured in [HRV18], which is equivalent to the so-called unit volume Seiberg bound of the boundary Liouville conformal field theory.

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  1. Tail Profile of Bulk Gaussian Multiplicative Chaos Measures I: Bulk/Boundary Quotients

    math.PR 2025-02 conditional novelty 6.0 of 10

    The (p,q)-moment of the bulk/boundary quotient of Gaussian multiplicative chaos is finite whenever p is below min(2/γ²+q/2, 4/γ²), and blows up at the 4/γ² boundary.

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