  Charge fluctuations for a baryon-neutral quark-gluon plasma have been
calculated in lattice gauge theory. These fluctuations provide a well-posed
rigorous representation of the quark chemistry of the vacuum for temperatures
above T_c >~ 155 MeV. Due to the finite lifetime and spatial extent of the
fireball created in relativistic heavy ion collisions, charge-charge
correlations can only equilibrate for small volumes due to the finite time
required to transport charge. This constraint leads to charge correlations at
finite relative position that evolve with time. The source and evolution of
such correlations is determined by the evolution of the charge fluctuation and
the diffusion constant for light quarks. Here, calculations are presented for
the evolution of such correlations superimposed onto hydrodynamic simulations.
Results are similar to preliminary measurements from STAR, but significant
discrepancies remain.
