21 research outputs found
Random Curves by Conformal Welding
We construct a conformally invariant random family of closed curves in the
plane by welding of random homeomorphisms of the unit circle given in terms of
the exponential of Gaussian Free Field. We conjecture that our curves are
locally related to SLE for .Comment: 5 page
Statistical Mechanics of Logarithmic REM: Duality, Freezing and Extreme Value Statistics of Noises generated by Gaussian Free Fields
We compute the distribution of the partition functions for a class of
one-dimensional Random Energy Models (REM) with logarithmically correlated
random potential, above and at the glass transition temperature. The random
potential sequences represent various versions of the 1/f noise generated by
sampling the two-dimensional Gaussian Free Field (2dGFF) along various planar
curves. Our method extends the recent analysis of Fyodorov Bouchaud from the
circular case to an interval and is based on an analytical continuation of the
Selberg integral. In particular, we unveil a {\it duality relation} satisfied
by the suitable generating function of free energy cumulants in the
high-temperature phase. It reinforces the freezing scenario hypothesis for that
generating function, from which we derive the distribution of extrema for the
2dGFF on the interval. We provide numerical checks of the circular and
the interval case and discuss universality and various extensions. Relevance to
the distribution of length of a segment in Liouville quantum gravity is noted.Comment: 25 pages, 12 figures Published version. Misprint corrected,
references and note adde
Bayesian computation: a summary of the current state, and samples backwards and forwards
Isomorphisms of Royden Type Algebras over
Let and be the unit circle and the unit disc in the plane and let us denote by the algebra of the complex valued continuous functions on which are traces of functions in the Sobolev class . On we define the following norm where is the harmonic extension of to . We prove that every isomorphism of the functional algebra is a quasisymmetric change of variables on