  We present an ab initio approach to electronic transport in nanoscale systems
which includes electronic correlations through the GW approximation. With
respect to Landauer approaches based on density-functional theory (DFT), we
introduce a physical quasiparticle electronic-structure into a non-equilibrium
Green's function theory framework. We use an equilibrium non-selfconsistent
$G^0W^0$ self-energy considering both full non-hermiticity and dynamical
effects. The method is applied to a real system, a gold mono-atomic chain. With
respect to DFT results, the conductance profile is modified and reduced by to
the introduction of diffusion and loss-of-coherence effects. The linear
response conductance characteristic appear to be in agreement with experimental
results.
