"The density in the density of states"
Relatore: Dr Kim Splittorff- NBI - Copenhagen
28 Novembre 2013 ore 16.00
|The key part of the density of states approach to QCD at nonzero chemical
potential is the distribution of the phase of the fermion determinant.
We show that this phase angle distribution will appear almost indistinguishable
from a Gaussian in large volumes. Corrections to this Gaussian, however, can
result in significant corrections to the free energy even if they are down by
powers of the volume. In consequence, one must determine the phase angle
distribution to a relative accuracy of at least one power, and quite possibly
higher powers, of the inverse lattice volume in order to obtain the full free
energy in QCD at nonzero chemical potential using the density of states