Simple and complex formulations of quantum transport
I discuss two methods that help us to understand and predict transport properties of nanoscale
systems. The first one allows us to calculate the conductance of quantum junctions by correlated
first-principles ground-state techniques. I will demonstrate the performance of the technique on
simple metallic junctions. The second method, based on a novel stroboscopic wavepacket basis
set, offers insight and mean-field predictions of the time-dependent and non-linear behaviour for
systems with applied external bias. I will discuss applications of the latter for relaxation dynamics of
a switching-on process in a simple model junctions and for current induced spin polarisation in
nanostructures.
Detaljer
Tid:
17. april 2008,
kl. 14.00
Sted: DTU Building 311, meeting room, ground floor