New Nf = 2 pseudofermion action for Monte Carlo simulations of a lattice field theory with domain-wall fermions

Yu-Chih Chen and Ting-Wai Chiu* 2019 Physical Review D 100 054513 (2019)

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 32^4 lattice with Nf=10 massless DWF and the Wilson plaquette gauge action at 6/g^2=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.