The Sign Problem via Imaginary Chemical Potential
Abstract
Description
We calculate an analogue of the average phase factor of the staggered fermion determinant at imaginary chemical potential. Our results from the lattice agree well with the analytical predictions in the microscopic regime for both quenched and phase-quenched QCD. We demonstrate that the average phase factor in the microscopic domain is dominated by the lowest-lying Dirac eigenvalues.
6 pages, 5 figures, introduction extended and figure 4 updated, version to appear in PRD
6 pages, 5 figures, introduction extended and figure 4 updated, version to appear in PRD