Gibbs Measures for Self-Interacting Wiener Paths
2006, v.12, №4, 747-766
We study a class of specifications over $d$-dimensional Wiener measure which are invariant under translation of the paths. We address the problem of existence and uniqueness of the Gibbs measures and prove a central limit theorem for the rescaled process. These results apply to the study of the ground state of the Nelson model of a quantum particle interacting with a scalar boson field.
Keywords: Gibbs measures,Nelson model,scaling limits