Improvement of algorithms for dynamical overlap fermions

TL;DR

This paper explores algorithmic improvements for dynamical overlap fermions to enhance large-scale lattice QCD simulations, focusing on optimizing Hybrid Monte Carlo and iterative solvers for cost efficiency.

Contribution

It identifies optimal combinations of algorithms and parameters for efficient $N_f=2$ overlap fermion simulations on large lattices.

Findings

Optimized Hybrid Monte Carlo parameters for overlap fermions.

Reduced computational costs in large-scale simulations.

Successful implementation on a $16^3\times 32$ lattice at 0.12 fm.

Abstract

We investigate the algorithms for dynamical overlap fermions aiming at improving the performance for large-scale simulations. We look for the best combination of Hybrid Monte Carlo options and iterative quark solvers with respect to the numerical costs. Our main target is a $N_f=2$ simulation with overlap fermion on a $16^3\times 32$ lattice at lattice spacing around 0.12 fm.