Implementing noise reduction techniques into theOpenQ*D package

Abstract

We present the results of testing a new technique for stochastic noise reduction in the calculation of propagators by implementing it in OpenQ*D for two ensembles with O(a) improved Wilson fermion action, with periodic boundary conditions and pion masses of 437 MeV and 331 MeV, for the connected vector and pseudoscalar correlators. We find that the technique yields no speedup compared to traditional methods, owning to the failure of its underlying assumption that the spectra of the spatial Laplacian and Dirac operators are sufficiently similar for the technique's purposes.

The 38th International Symposium on Lattice Field Theory, 2021 Zoom/Gather@Massachusetts Institute of Technology, LATTICE2021 26th-30th July