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 tidsskriftTidsskriftartikelForskningpeer review

Resumé

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.
OriginalsprogUdefineret/Ukendt
TidsskriftComput.Phys.Commun.
DOI
StatusUdgivet - 2. jun. 2006

Bibliografisk note

13 pages, 6 figures

Emneord

  • hep-lat

Citer dette

Meyer, Harvey B. ; Simma, Hubert ; Sommer, Rainer ; Morte, Michele Della ; Witzel, Oliver ; Wolff, Ulli. / Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD. I: Comput.Phys.Commun. 2006.
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Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD. / Meyer, Harvey B.; Simma, Hubert; Sommer, Rainer; Morte, Michele Della; Witzel, Oliver; Wolff, Ulli.

I: Comput.Phys.Commun., 02.06.2006.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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

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

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