Simulation of dynamical (u,d,s,c) domain-wall/overlap quarks at the physical point

Abstract

We perform hybrid Monte-Carlo simulation of $N_f=2+1+1$ lattice QCD with domain-wall quarks at the physical point. The simulation is carried out on the $L^3\times T=64^3\times 64$ lattice with lattice spacing $a\sim 0.064$ fm ($L>4$ fm, and $M_{\pi }L>3$), using the Nvidia DGX-1 (8 V100 GPUs interconnected by the NVLink). To attain the maximal chiral symmetry for a finite extent ($N_s=16$) in the fifth dimension, we use the optimal domain-wall fermion for the quark action, together with the exact one-flavor action for domain-wall fermion. We outline the salient features of our simulation (without topology freezing, and small residual mass), together with the preliminary result of the masses of ${\pi }^{\pm }$, $K^{\pm }$, and $D^{\pm }$.

Comments: 7 pages, talk presented at The 36th Annual International Symposium on Lattice Field Theory (Lattice 2018), 22-28 July, 2018, Michigan State University, East Lansing, Michigan, USA