Combining Quark and Link Smearing to Improve Extended Baryon Operators
Adam Lichtl, Subhasish Basak, Robert Edwards, George T. Fleming, Urs M. Heller, Colin Morningstar, David Richards, Ikuro Sato, Stephen Wallace
Abstract
The effects of Gaussian quark-field smearing and analytic stout-link smearing on the correlations of gauge-invariant extended baryon operators are studied. Gaussian quark-field smearing substantially reduces contributions from the short wavelength modes of the theory, while stout-link smearing significantly reduces the noise from the stochastic evaluations. The use of gauge-link smearing is shown to be crucial for baryon operators constructed of covariantly-displaced quark fields. Preferred smearing parameters are determined for a lattice spacing as ~ 0.1 fm.
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