Applications of the Stochastic LapH Method

TL;DR

This paper discusses the application of the stochastic LapH method in lattice QCD to compute hadron spectra, enabling efficient all-to-all quark propagator calculations for excited state analysis.

Contribution

It introduces the stochastic LapH algorithm as an effective quark smearing technique that facilitates all-to-all propagator computations in lattice QCD.

Findings

Successful implementation on 2+1 dynamical anisotropic lattices

Progress in accessing excited states across various isospin channels

Enhanced ability to compute multi-particle operators

Abstract

Progress in computing the hadron spectrum in lattice QCD using stochastic LapH quark propaga- tors is described. The stochastic LapH algorithm is a particular quark smearing algorithm that also allows the computation of all-to-all quark propagators. All-to-all quark propagators are required in our approach of using a large set of spatially extended hadron operators and explicit multi- particle operators to access excited states. We report on the progress made in the various isospin channels on 2+1 dynamical, anisotropic lattices generated by the Hadron Spectrum Collaboration.