Improved stochastic estimation of quark propagation with Laplacian Heaviside smearing in lattice QCD
By C. Morningstar, J. Bulava, J. Foley, K. Juge, D. Lenkner, M. Peardon, C. Wong. 2011
148 citations recorded by the source corpus.
A new method of stochastically estimating the low-lying effects of quark propagation is proposed which allows accurate determinations of temporal correlations of single-hadron and multi-hadron operators in lattice QCD. The method is well suited for calculations in large volumes. Contributions involving quark propagation connecting hadron sink operators at the same final time can be handled in a straightforward manner, even for a large number of final time slices. The method exploits Laplacian Heaviside (LapH) smearing. ZN noise is introduced in a novel way, and variance reduction is achieved using judiciously-chosen noise dilution projectors. The method is tested using isoscalar mesons in the scalar, pseudoscalar, and vector channels, and using the two-pion system of total isospin I = 0,1,2 on large anisotropic 24 3 × 128 lattices with spatial spacing as � 0.12 fm and temporal spacing at � 0.034 fm for pion masses m� � 390 and 240 MeV.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/3ee15739fe6488664f42dc91797365ae86015973
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In Nuclear and High Energy Physics
- R. Young
- J. Dudek
- Christian Hoelbling
- Zoltán Fodor
- R. Briceño
- C. Fischer
- Markus Q. Huber
- Sándor D. Katz
Citations in the corpus
- Light Hadron Masses from Lattice QCD (2012, methodology): “26 by not computing propagators on all eigenmodes exactly but instead using stochastic techniques, similar to the ones described above, in the eigenspace of low modes to estimate them (Morningstar et al., 2010, 2011).”
- Scattering processes and resonances from lattice QCD (2017, background): “…such as those described in (Blossier et al., 2009; Dudek, 2011; Dudek and Edwards, 2012; Dudek et al., 2013a, 2011a, 2009, 2010; Edwards et al., 2011; Foley et al., 2005; Liu et al., 2012; Luscher, 1986b; Luscher and Wolff, 1990; Michael, 1985; Morningstar et al., 2011; Peardon et al., 2009).”