The Exponential of the S^1 Trace of the Free Field and Verblunsky Coefficients

Mohammad Latifi, Doug Pickrell

Published 2020-02-15Version 1

An identity of Szego, and a volume calculation, heuristically suggest a simple expression for the distribution of Verblunsky coefficients with respect to the (normalized) exponential of the $S^1$ trace of the Gaussian free field. This heuristic expression is incorrect. We show that what we believe to be the correct formula is equivalent to a family of combinatorial identities (for moments of measures) which are of intrinsic interest and which are relatively easy to check empirically.