Instabilities in Molecular Dynamics Integrators used in Hybrid Monte Carlo Simulations

Details Instabilities in Molecular Dynamics Integrators used in Hybrid Monte Carlo Simulations Instabilities in Molecular Dynamics Integrators used in Hybrid Monte Carlo Simulations

2001-10-11

arxiv.org/abs/hep-lat/0110047v1

Nucl.Phys.Proc.Suppl. 106 (2002) 1073-1075

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2001(algorithms)

Scientific paper

We discuss an instability in the leapfrog integration algorithm, widely used in current Hybrid Monte Carlo (HMC) simulations of lattice QCD. We demonstrate the instability in the simple harmonic oscillator (SHO) system where it is manifest. We demonstrate the instability in HMC simulations of lattic QCD with dynamical Wilson-Clover fermions and discuss implications for future simulations of lattice QCD.

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