Computation of disconnected contributions to nucleon observables
Constantia Alexandrou, Vincent Drach, Karl Jansen, Giannis Koutsou,, Alejandro Vaquero
TL;DR
This paper compares various computational methods for disconnected fermion loops in nucleon three-point functions, using twisted mass fermions and optimized GPU code to evaluate their efficiency and accuracy.
Contribution
It provides a systematic comparison of methods for disconnected contributions and offers guidelines for choosing the most effective approach for different operators.
Findings
Identifies the most efficient methods for specific operator classes.
Demonstrates optimized GPU code implementation for complex calculations.
Provides practical guidelines for future lattice QCD computations.
Abstract
We compare several methods for computing disconnected fermion loops contributing to nucleon three-point functions. The comparison is carried out using one ensemble of twisted mass fermions with pion mass of 373 MeV. The complete set of operators up to one-derivative are examined by developing optimized code for mutli-GPUs. Simple guidelines are given as to the preferable method for each class of operators.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research