Gibbs measures for self-interacting Wiener paths

Details Gibbs measures for self-interacting Wiener paths Gibbs measures for self-interacting Wiener paths

2005-11-22

arxiv.org/abs/math-ph/0511068v2

Physics

Mathematical Physics

15 pages, no figures; typos, details added to the proofs

Scientific paper

In this note we study a class of specifications over $d$-dimensional Wiener measure which are invariant under uniform translation of the paths. This degeneracy is removed by restricting the measure to the $\sigma$-algebra generated by the increments of the coordinate process. We address the problem of existence and uniqueness of Gibbs measures and prove a central limit theorem for the rescaled increments. These results apply to the study of the ground state of the Nelson model of a quantum particle interacting with a scalar boson field.

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