Topological Charge in Two Flavors QCD with Optimal Domain-Wall Fermion

Abstract

We measure the topological charge of the gauge configurations generated by lattice simulations of 2 flavors QCD on a $16^3\times 32$ lattice, with Optimal Domain-Wall Fermion (ODWF) at $N_s=16$ and plaquette gauge action at $\beta =5.90$. Using the Adaptive Thick-Restart Lanczos algorithm, we project the low-lying modes of the 4D effective Dirac operator of ODWF, and obtain the topological charge and topological susceptibility. Our result of topological susceptibility agrees with the sea-quark mass dependence predicted by the chiral perturbation theory, and provides a determination of the chiral condensate.

Comments: 7 pages, 3 figures, talk presented at the 28th International Symposium on Lattice Field Theory, Lattice 2010, June 14-19, 2010, Villasimius, Italy