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Title Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator
Authors Michael Clark,Balint Joo,Anthony Kennedy,Paulo Silva
JLAB number JLAB-IT-11-06
LANL number arXiv:1108.1828
Other number DOE/OR/23177-2972
Document Type(s) (Journal Article) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No
 

Journal
Compiled for Physical Review D
Volume 84
Issue 07
Page(s) 071502(R)
Refereed
Publication 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.
Experiment Numbers: other
Group: Scientific Computing
Document: pdf
DOI: http://dx.doi.org/10.1103/PhysRevD.84.071502
Accepted Manuscript:
Supporting Documents:
Supporting Datasets: