The Aoki phase for N_f=2 Wilson fermions revisited

Abstract

We report on a numerical reinvestigation of the Aoki phase in full lattice QCD with two flavors of unimproved Wilson fermions. For zero temperature the Aoki phase can be confirmed at inverse coupling $\beta =4.0$ and $\beta =4.3$, but not at $\beta =4.6$ and $\beta =5.0$. At non-zero temperature the Aoki phase was found to exist also at $\beta =4.6$.

Comments: 3 pages LaTex, 5 figures. Parallel talk at Lattice2003(Theory)