Tuning actions and observables in lattice QCD

Irving, A.C.; Sexton, James; Cahill, Eamonn; Garden, Joyce; Joó, Bálint; Pickles, Stephen; Sroczynski, Z.

doi:10.1103/physrevd.58.114504

Cited by 19 publications

(28 citation statements)

References 15 publications

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“…Otherwise, since the tuning of [20] can be carried out in any measure, one can perform a quenched simulation, and employ a self consistent procedure to find λ One can then shift the x f even further so that practically all the values of x f are greater than 0. This can be achieved by defining…”

Section: Loop Splitting Specificsmentioning

confidence: 99%

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The Kentucky noisy Monte Carlo algorithm for Wilson dynamical fermions

2003

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We develop an implementation for a recently proposed Noisy Monte Carlo approach to the simulation of lattice QCD with dynamical fermions by incorporating the full fermion determinant directly. Our algorithm uses a quenched gauge field update with a shifted gauge coupling to minimize fluctuations in the trace log of the Wilson Dirac matrix. The details of tuning the gauge coupling shift as well as results for the distribution of noisy estimators in our implementation are given. We present data for some basic observables from the noisy method, as well as acceptance rate information and discuss potential autocorrelation and sign violation effects. Both the results and the efficiency of the algorithm are compared against those of Hybrid Monte Carlo.

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Section: Loop Splitting Specificsmentioning

confidence: 99%

“…At this point, one can start to carry out simulations with the noisy algorithm, re-tuning β and the other parameters along the way until a self consistency is achieved. This is possible because the tuning in [20] can be carried out in any measure.…”

Section: Equilibrationmentioning

confidence: 99%

The Kentucky noisy Monte Carlo algorithm for Wilson dynamical fermions

2003

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“…In [3] we show that the value of the decay constant depends strongly on the value of the mixing coefficient c A . (7). However, observables computed with these coefficients have the same continuum limit, provided each set of coefficients is determined consistently.…”

Section: Quenched Decay Constantsmentioning

confidence: 99%

“…The UKQCD collaboration has a set of matched ensembles [7], where the lattice spacing (as measured by r 0 ) is fixed to be the same, as β and m sea q are varied, including a quenched set. These ensembles are NP O(a) improved.…”

Section: Decay Constants Withmentioning

confidence: 99%

Heavy-light decay constants on the lattice

2002

Nuclear Physics B - Proceedings Supplements

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We present results for the leptonic decays of heavy-light mesons in the quenched approximation and a preliminary result for fD s with dynamical fermions for N f = 2. We examine the systematic effects of extrapolating the decay constants from the charm to the bottom quark mass, and find this extrapolation to be under control. We present a preliminary result for f N f =2 Ds and compare to f N f =0 Ds matched to have the same lattice spacing set by the Sommer scale, r0. We find no significant difference.

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“…There has been recent interest in the so-called 'Ultraviolet slowing down' of fermionic simulations in lattice QCD [Irving et al, 1998, Duncan, Eichten and Thacker, 1999, de Forcrand, 1999, Peardon, Lattice2001, A. Hasenfratz & Knechtli, 2001. These studies try to address algortmically large fluctuations of the high end modes of the fermion determinant.…”

Section: Introductionmentioning

confidence: 99%