An Improved Gaussian Approximation for Quantum Field Theory
Antun Balaz, Aleksandar Belic, Aleksandar Bogojevic
Abstract
We present a new approximation technique for quantum field theory. The standard one-loop result is used as a seed for a recursive formula that gives a sequence of improved Gaussian approximations for the generating functional. In a different setting, the basic idea of this recursive scheme is used in the second part of the paper to substantialy speed up the standard Monte Carlo algorithm.
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