We 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.
@article{arxiv.1111.2116,
title = {Histogram method in finite density QCD with phase quenched simulations},
author = {Y. Nakagawa and S. Ejiri and S. Aoki and K. Kanaya and H. Ohno and H. Saito and T. Hatsuda and T. Umeda},
journal= {arXiv preprint arXiv:1111.2116},
year = {2012}
}