  The present work develops a theoretical procedure for obtaining transport
coefficients of Yukawa systems from density fluctuations. The dynamics of
Yukawa systems are described in the framework of the generalized hydrodynamic
model that incorporates strong coupling and visco-elastic memory effects. A
hydrodynamic matrix for such a system is exactly derived and then used to
obtain an analytic expression for the density autocorrelation function (DAF)- a
marker of the time dynamics of density fluctuations. The present approach is
validated against a DAF obtained from numerical data of Molecular Dynamics (MD)
simulations of a dusty plasma system that is a practical example of a Yukawa
system. The MD results and analytic expressions derived from the model
equations are then used to obtain various transport coefficients and the latter
are compared with values available in the literature from other models. The
influence of strong coupling and visco-elastic effects on the transport
parameters are discussed. Finally, the utility of our calculations for
obtaining reliable estimates of transport coefficients from experimentally
determined DAF is pointed out.
