Numerical Stochastic Perturbation Theory in $\varphi^4$ Theory

Jun 28, 2017, 10:15 AM
30m
Talk

Speaker

Marco Garofalo (Higgs Centre for Theoretical Physics, The University of Edinburgh)

Description

Numerical stochastic perturbation theory (NSPT) is a powerful tool for estimating high-order perturbative expansions in lattice field theory. The standard NSPT is based on the Langevin equation. In this contribution, we investigate in $\varphi^4$ theory some alternative methods. In particular, we present a study of the recently proposed Instantaneous Stochastic Perturbation Theory, as well as a formulation of numerical stochastic perturbation theory based on Generalised Hybrid Molecular Dynamics algorithms.

Title Numerical Stochastic Perturbation Theory in $\varphi^4$ Theory

Primary authors

Marco Garofalo (Higgs Centre for Theoretical Physics, The University of Edinburgh) Mattia Dalla Brida (DESY - Zeuthen) Prof. Anthony Kennedy (Higgs Centre for Theoretical Physics, The University of Edinburgh)

Presentation materials