> Dear Joe, > Thanks a lot for clarifying these points for me. So the local > densities and local currents in Tutorial 2.7 correspond to the > scattering state incoming in mode 0 of lead 0.
> I still feel confused. Why we only consider a *single* scattering > state from one lead? Because you want to gain more insight about where different contributions come from? Sure the LDOS is the thing that you can probe experimentally, but the big advantage of doing numerics is to gain insight *beyond* that. The tutorial example just uses a single scattering state to illustrate the use of the 'operator' module without the extra clutter of summing over the scattering states. > Can the local densities and currents associated with a *single* > scattering state show the transport properties of the system? Not necessarily, but as I said previously it is useful to be able to go beyond what is experimentally measureable in order to gain more insight. Happy Kwanting, Joe
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