Speaker
Description
Using a cluster of Nvidia DGX-1 (8*V100 interconnected by the NVLink), TWQCD Collaboration has generated the first gauge ensemble of $N_f=2+1+1 $ lattice QCD with physical domain-wall quarks, 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 $). The gauge ensemble constitutes of ~200 gauge configurations, resulting from ~1000 HMC trajectories by sampling one configuration every 5 trajectories. The salient features of the HMC simulation are: to perserve the chiral symmetry to high precision, and to sample all topological sectors ergodically. In this talk, I will outline the HMC simulation and the generation of the gauge ensemble. Moreover, I will present the first physical results (e.g., the mass spectra of charmed mesons and baryons) from this $N_f = 2+1+1 $ gauge ensemble with physical domain-wall quarks.
