Wilson fermions with imaginary chemical potential

Abstract

We study the phase structure of imaginary chemical potential. We calculate the Polyakov loop using clover-improved Wilson action and renormalization improved gauge action. We obtain a two-state signals indicating the first order phase transition for $\beta =1.9,{\mu }_I=0.2618,\kappa =0.1388$ on $8^3\times 4$ lattice volume We also present a result of the matrix reduction formula for the Wilson fermion.

8pages, 4figures. Proceedings of the XXVII International Symposium on Lattice Field Theory (LATTICE2009), July 26-31, 2009, Peking University, Beijing, China