  A review of the research on electron and ion transport in dense rare gases is
presented. The investigation of the transport properties of electrons in dense
rare gases aims at understanding the dynamics and energetics of electron states
in a dense medium and at elucidating how changes of the environment influence
their nature and scattering properties. The quantum nature of electrons couples
them to the environment is such a way to produce a density-dependent shift of
their energy that is the key to rationalize the observed phenomena.
