We present a generalized mode-coupling theory for a dense binary fluid
mixture. The theory is used to calculate molecular-scale renormalizations to
the stress-tensor autocorrelation function (STAF) and to the long-wavelength
zero-frequency shear viscosity. As in the case of a dense simple fluid, we find
that the STAF appears to decay as t−3/2 over an intermediate range of
time. The coefficient of this long-time tail is more than two orders of
magnitude larger than that obtained from conventional mode-coupling theory. Our
study focuses on the effect of compositional disorder on the decay of the STAF
in a dense mixture.Comment: Published; withdrawn since ordering in the archive gives misleading
impression of new publicatio
