Speaker
Prof.
Ting-Wai Chiu
(National Taiwan University)
Description
Using a GPU cluster consisting of 25 units of Nvidia DGX-1 (each unit having 8*V100 interconnected by the NVLink), TWQCD collaboration has generated the first gauge ensembles of $N_f=2+1+1$ lattice QCD with physical domain-wall quarks on the $ L_x^3 \times L_t = 64^3 \times (6,8,10,12,16) $ lattices, in the temperature range $ T \simeq 200 - 550 $ MeV. The lattice spacing $a \sim 0.064 $~fm ($ La > 4 $ fm, and $ M_\pi La > 3 $) and the physical bare quark masses ($m_{u/d} a = 0.00125$, $m_s a = 0.04$, $m_c a = 0.55$) are determined with the zero temperature gauge ensemble resulting from the simulation of $N_f=2+1+1$ QCD on the $ 64^4 $ lattice. In this talk, I will outline the HMC simulation and the generation of the gauge ensembles. Moreover, I will present the first physical results (e.g., topological susceptibility) extracting from these $N_f = 2+1+1$ gauge ensembles with physical domain-wall quarks at finite temperatures.
Primary author
Prof.
Ting-Wai Chiu
(National Taiwan University)
