  The effects of long-range interactions in quantum transport are still largely
unexplored, mainly due to the difficulty of devising efficient embedding
schemes. In this work we present a substantial progress in the interacting
resonant level model by reducing the problem to the solution of
Kadanoff-Baym-like equations with a correlated embedding self-energy. The
method allows us to deal with short- and long-range interactions and is
applicable from the transient to the steady-state regime. Furthermore, memory
effects are consistently incorporated and the results are not plagued by
negative densities or non-conservation of the electric charge. We employ the
method to calculate densities and currents with long-range interactions
appropriate to low-dimensional leads, and show the occurrence of a jamming
effect which drastically reduces the screening time and suppresses the
zero-bias conductance. None of these effects are captured by short-range
dot-lead interactions.
