Histogram method in finite density QCD with phase quenched simulations

The XXIX Internaitonal Symposium on Lattice Field Theory, Lattice2011 July 10-16, 2011 Squaw Lake Tahoe, CaliforniaWe propose a new approach to finite density QCD based on a histogram method with phase quenched simulations at finite chemical potential. Integrating numerically the derivatives of the logarithm of the quark determinant with respect to the chemical potential, we calculate the reweighting factor and the complex phase of the quark determinant. The complex phase is handled with a cumulant expansion to avoid the sign problem. We examine the applicability of this method