%0 Journal Article
%T Quantum diffusion due to scattering non-locality in nanoscale semiconductors
%A Roberto Rosati
%A Fausto Rossi
%J Physics
%D 2013
%I arXiv
%R 10.1209/0295-5075/105/17010
%X In view of its local character, the semiclassical or Boltzmann theory is intrinsically unable to describe transport phenomena on ultrashort space and time scales, and to this purpose genuine quantum-transport approaches are imperative. By employing a density-matrix simulation strategy recently proposed, we shall demonstrate its power and flexibility in describing quantum-diffusion phenomena in nanoscale semiconductors. In particular, as for the case of carrier-carrier relaxation in photoexcited semiconductors, our analysis will show the failure of simplified dephasing models in describing phonon-induced scattering non-locality, pointing out that such limitation is particularly severe for the case of quasielastic dissipation processes.
%U http://arxiv.org/abs/1310.4430v3