Developments and new applications of numerical stochastic perturbation theory
G. Burgio, F. Di Renzo, G. Marchesini, E. Onofri, M. Pepe, L. Scorzato
Abstract
A review of new developments in numerical stochastic perturbation theory (NSPT) is presented. In particular, the status of the extension of the method to gauge fixed lattice QCD is reviewed and a first application to compact (scalar) QED is presented. Lacking still a general proof of the convergence of the underlying stochastic processes, a self-consistent method for testing the results is discussed.
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