Systematically accelerated convergence of path integrals.

@article{Bogojevic2005SystematicallyAC,
  title={Systematically accelerated convergence of path integrals.},
  author={Aleksandar Bogojevic and Antun Balaz and Aleksandar Belic},
  journal={Physical review letters},
  year={2005},
  volume={94 18},
  pages={
          180403
        }
}
We present a new analytical method that systematically improves the convergence of path integrals of a generic N-fold discretized theory. Using it we calculate the effective actions S(p) for p< or =9, which lead to the same continuum amplitudes as the starting action, but that converge to that continuum limit as 1/N(p). We checked this derived speedup in convergence by performing Monte Carlo simulations on several different models. 
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