2006/06/02 by Harvey B. Meyer, Hubert Simma, Rainer Sommer +3
Mathematics · Physics and Astronomy · #Autocorrelation #High-Energy Particle Collisions Research #Lattice (music) #Lattice QCD #Markov Chains and Monte Carlo Methods #Mathematics #Monte Carlo method #Observable #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Statistical physics #Statistics #Thermalisation #Trajectory #hep-lat
paper · pdf · doi:10.1016/j.cpc.2006.08.002
published as Comput.Phys.Commun.176:91-97,2007 · 13 pages, 6 figures
arxiv created 2006/06/02 · openalex publication_date 2006/09/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.