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Exact Correlation Functions in the Brownian Loop Soup

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arxiv 1912.00973 v2 pith:BZP3ISKO submitted 2019-12-02 math-ph cond-mat.stat-mechhep-thmath.MPmath.PR

classification math-phcond-mat.stat-mechhep-thmath.MPmath.PR
keywords correlationfunctionoperatorsfour-pointsoupbrownianchargesconformal
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We compute analytically and in closed form the four-point correlation function in the plane, and the two-point correlation function in the upper half-plane, of layering vertex operators in the two dimensional conformally invariant system known as the Brownian Loop Soup. These correlation functions depend on multiple continuous parameters: the insertion points of the operators, the intensity of the soup, and the charges of the operators. In the case of the four-point function there is non-trivial dependence on five continuous parameters: the cross-ratio, the intensity, and three real charges. The four-point function is crossing symmetric. We analyze its conformal block expansion and discover a previously unknown set of new conformal primary operators.

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  1. Brownian Loops, Layering Fields and Imaginary Gaussian Multiplicative Chaos

    math.PR 2019-08 accept novelty 7.0 of 10

    Renormalized Brownian loop soup layering fields converge in an appropriate Sobolev sense to a tilted imaginary Gaussian multiplicative chaos with covariance kernel given by the Brownian loop measure.

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