TY - JOUR
T1 - Improving dynamical lattice QCD simulations through integrator tuning using Poisson brackets and a force-gradient integrator
AU - Clark, M. A.
AU - Joó, Bálint
AU - Kennedy, A. D.
AU - Silva, P. J.
PY - 2011/10/14
Y1 - 2011/10/14
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=80555134675&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.84.071502
DO - 10.1103/PhysRevD.84.071502
M3 - Article
AN - SCOPUS:80555134675
SN - 1550-7998
VL - 84
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 071502
ER -