Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD

Harvey B. Meyer; Hubert Simma; Rainer Sommer; Michele Della Morte; Oliver Witzel; Ulli Wolff

doi:10.1016/j.cpc.2006.08.002

Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD

Harvey B. Meyer, Hubert Simma, Rainer Sommer, Michele Della Morte, Oliver Witzel, Ulli Wolff

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Abstrakt

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.

Originalsprog	Udefineret/Ukendt
Tidsskrift	Comput.Phys.Commun.
DOI	https://doi.org/10.1016/j.cpc.2006.08.002
Status	Udgivet - 2. jun. 2006

Bibliografisk note

13 pages, 6 figures

Emneord

hep-lat

Dokumenter og links

10.1016/j.cpc.2006.08.002

Citationsformater

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abstract = " 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. ",

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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

N1 - 13 pages, 6 figures

PY - 2006/6/2

Y1 - 2006/6/2

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 - Tidsskriftartikel

JO - Computer Physics Communications

JF - Computer Physics Communications

SN - 0010-4655

ER -