Speeding up the Hybrid-Monte-Carlo algorithm for dynamical fermions
M. Hasenbusch, K. Jansen
TL;DR
This paper introduces a modified Hybrid-Monte-Carlo algorithm that enables larger step-sizes by splitting the pseudo-fermion action, tested on lattice models to improve efficiency.
Contribution
A novel splitting method for the pseudo-fermion action that enhances the Hybrid-Monte-Carlo algorithm's step-size without sacrificing acceptance rate.
Findings
Successful application to 2D lattice Schwinger model
Effective in 4D lattice QCD with Wilson-fermions
Improved computational efficiency
Abstract
We propose a modification of the Hybrid-Monte-Carlo algorithm that allows for a larger step-size of the integration scheme at constant acceptance rate. The key ingredient is the splitting of the pseudo-fermion action into two parts. We test our proposal at the example of the two-dimensional lattice Schwinger model and four-dimensional lattice QCD with two degenerate flavours of Wilson- fermions.
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