Work

Variance reduction via deflation with local coherence

Year: 2024

Type: conference-paper

Abstract: In large enough volumes, translation-averaging for quark-line connected diagrams reduces the variance inversely proportional to the volume. Stochastic estimators which implement translation averaging however introduce new sources of fluctuations, which in some cases can be relatively large. In this work, we explore whether inexact deflation subspaces can be used to improve the precision of the isovector vector correlators. We perform numerical experiments with $N_\mathrm{f}=2$ non-perturbatively $\mathrm O(a)$-improved Wilson fermions and measure the relative contribution from the deflation subspace to the central value and the corresponding variance.

Source: International Symposium on Lattice Field Theory (LATTICE)

DOI: 10.22323/1.453.0153

Authors: Roman Gruber, Tim Harris, Marina Marinkovic

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4403341568

FWCI:

Cites:

Cited by:

Related to: 10