TY - JOUR
T1 - Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD
AU - Meyer, Harvey B.
AU - Simma, Hubert
AU - Sommer, Rainer
AU - Morte, Michele Della
AU - Witzel, Oliver
AU - Wolff, Ulli
PY - 2007/1
Y1 - 2007/1
N2 - We study autocorrelation times of physical observables in lattice QCD as a function of the molecular dynamics trajectory length in the hybrid Monte-Carlo algorithm. In an interval of trajectory lengths where energy and reversibility violations can be kept under control, we find a variation of the integrated autocorrelation times by a factor of about two in the quantities of interest. Trajectories longer than conventionally used are found to be superior both in the Nf=0 and Nf=2 examples considered here. We also provide evidence that they lead to faster thermalization of systems with light quarks.
AB - We study autocorrelation times of physical observables in lattice QCD as a function of the molecular dynamics trajectory length in the hybrid Monte-Carlo algorithm. In an interval of trajectory lengths where energy and reversibility violations can be kept under control, we find a variation of the integrated autocorrelation times by a factor of about two in the quantities of interest. Trajectories longer than conventionally used are found to be superior both in the Nf=0 and Nf=2 examples considered here. We also provide evidence that they lead to faster thermalization of systems with light quarks.
KW - hep-lat
U2 - 10.1016/j.cpc.2006.08.002
DO - 10.1016/j.cpc.2006.08.002
M3 - Journal article
SN - 1386-9485
VL - 176
SP - 91
EP - 97
JO - Computer Physics Communications
JF - Computer Physics Communications
IS - 2
ER -