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Loop soup representation of zeta-regularised determinants and equivariant Symanzik identities

Pierre PerruchaudIsao Sauzedde
Feb 2024
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摘要原文
We derive a stochastic representation for determinants of Laplace-type operators on vectors bundles over manifolds. Namely, inverse powers of those determinants are written as the expectation of a product of holonomies defined over Brownian loop soups. Our results hold over compact manifolds of dimension 2 or 3, in the presence of mass or a boundary. We derive a few consequences, including some regularity as a function of the operator and the conformal invariance of the zeta function on surfaces. Our second main result is the rigorous construction of a stochastic gauge theory minimally coupling a scalar field to a prescribed random smooth gauge field, which we prove obeys the so-called Symanzik identities. Some of these results are continuous analogues of the work of A. Kassel and T. L\'evy in the discrete.
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