Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator

M. A. Clark, Bálint Joó, A. D. Kennedy, P. J. Silva

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

We show how the integrators used for the molecular dynamics step of the Hybrid Monte Carlo algorithm can be further improved. These integrators not only approximately conserve some Hamiltonian H but conserve exactly a nearby shadow Hamiltonian H. This property allows for a new tuning method of the molecular dynamics integrator and also allows for a new class of integrators (force-gradient integrators) which is expected to reduce significantly the computational cost of future large-scale gauge field ensemble generation.

Original languageEnglish
Article number071502
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number7
DOIs
StatePublished - Oct 14 2011
Externally publishedYes

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