New Nf=2 pseudofermion action for Monte Carlo simulations of a lattice field theory with domain-wall fermions NEW Nf=2 PSEUDOFERMION ACTION for MONTE CARLO ? YU-CHIH CHEN and TING-WAI CHIU

We construct a novel Nf=2 pseudofermion action for Monte Carlo simulation of a lattice gauge theory with domain-wall fermions (DWF), which is applicable for all variants of DWF. This new action is particularly useful for the challenging simulations of lattice gauge theories with large Nf=2n DWF, on the large lattices, and in the strong-coupling regime. For the SU(3) lattice gauge theory on the 324 lattice with Nf=10 massless DWF and the Wilson plaquette gauge action at 6/g02=5.70, the efficiency (speed×acceptance rate) of the hybrid Monte Carlo simulation with the new action is about 1.2 times that of its counterpart with the traditional action. ? 2019 authors. Published by the American Physical Society.