skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

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.

Authors:
 [1];  [2];  [3];  [4]
  1. Harvard
  2. JLAB
  3. Edinburgh
  4. Coimbra
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE SC Office of Advanced Scientific Computing Research (SC-21)
OSTI Identifier:
1114476
Report Number(s):
JLAB-IT-11-06; DOE/OR/23177-2972; arXiv:1108.1828
FC02-06ER41440; FC02- 06ER41449
DOE Contract Number:  
AC05-060R23177
Resource Type:
Journal Article
Journal Name:
Phys.Rev. D
Additional Journal Information:
Journal Volume: 84; Journal Issue: 07
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Clark, Michael A., Joo, Balint, Kennedy, Anthony D., and Silva, Paolo J. Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator. United States: N. p., 2011. Web. doi:10.1103/PhysRevD.84.071502.
Clark, Michael A., Joo, Balint, Kennedy, Anthony D., & Silva, Paolo J. Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator. United States. doi:10.1103/PhysRevD.84.071502.
Clark, Michael A., Joo, Balint, Kennedy, Anthony D., and Silva, Paolo J. Sat . "Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator". United States. doi:10.1103/PhysRevD.84.071502.
@article{osti_1114476,
title = {Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator},
author = {Clark, Michael A. and Joo, Balint and Kennedy, Anthony D. and Silva, Paolo J.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.84.071502},
journal = {Phys.Rev. D},
number = 07,
volume = 84,
place = {United States},
year = {2011},
month = {10}
}