Strong-coupling expansion of lattice O(N) sigma models

Abstract

We report progress in the computation and analysis of strong-coupling series of two- and three-dimensional $\mathrm{O}(N)$ $\sigma$ models. We show that, through a combination of long strong-coupling series and judicious choice of observables, one can compute continuum quantities reliably and with a precision at least comparable with the best available Monte Carlo data.

Comments: 4 pages, compressed uuencoded PostScript, Contribution to Lattice 95