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arXiv · hep-lat/0109005

Adaptive Optimization of Wave Functions for Lattice Field Models

Matteo Beccaria·Massimo Campostrini·Alessandra Feo
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Abstract

The accuracy of Green Function Monte Carlo (GFMC) simulations can be greatly improved by a clever choice of the approximate ground state wave function that controls configuration sampling. This trial wave function typically depends on many free parameters whose fixing is a non trivial task. Here, we discuss a general purpose adaptive algorithm for their non-linear optimization. As a non trivial application we test the method on the two dimensional Wess-Zumino model, a relativistically invariant supersymmetric field theory with interacting bosonic and fermionic degrees of freedom.

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Matteo Beccaria, Massimo Campostrini, Alessandra Feo. 2001-09-13. Adaptive Optimization of Wave Functions for Lattice Field Models. https://arxiv.org/abs/hep-lat/0109005

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