Evaluation of disconnected contributions using GPUs

Understand

We calculate on GPUs the disconnected diagrams associated with the nucleon form factors and moments of generalized parton distributions using Nf=2+1+1 twisted mass fermions.

• We employ the truncated solver method (TSM) for estimating the all-to-all propagators.
• Due to the fact that the TSM involves many low precision stochastic estimators, the usage of GPUs is essential to perform efficiently the contractions and the inversions.