Accelerating Dynamical Fermion Computations using the Rational Hybrid Monte Carlo (RHMC) Algorithm with Multiple Pseudofermion Fields

Abstract

There has been much recent progress in the understanding and reduction of the computational cost of the Hybrid Monte Carlo algorithm for Lattice QCD as the quark mass parameter is reduced. In this letter we present a new solution to this problem, where we represent the fermionic determinant using (n) pseudofermion fields, each with an (\nth) root kernel. We implement this within the framework of the Rational Hybrid Monte Carlo (RHMC) algorithm. We compare this algorithm with other recent methods in this area and find it is competitive with them.

4 pages, 2 figures. Submitted to PRL

Cited by in corpus (15)

• The QCD transition temperature: results with physical masses in the continuum limit
• The QCD transition temperature: results with physical masses in the continuum limit II.
• Equation of state and QCD transition at finite temperature
• First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass
• Deflation acceleration of lattice QCD simulations
• Neutral kaon mixing from 2+1 flavor Domain Wall QCD
• Two-flavor QCD simulation with exact chiral symmetry
• Non-perturbative improvement of stout-smeared three flavour clover fermions
• Scaling study of dynamical smeared-link clover fermions
• Higher representations on the lattice: perturbative studies
• Localization and chiral symmetry in 2+1 flavor domain wall QCD
• Speeding up HMC with better integrators
• Asymptotics of Fixed Point Distributions for Inexact Monte Carlo Algorithms
• 2+1 flavour Domain Wall Fermion simulations by the RBC and UKQCD collaborations
• Dynamical fermions in lattice quantum chromodynamics