Thanks a lot Joseph. That really helps a lot! I now get what I need to do.
On Mon, Jun 11, 2018 at 10:14 PM Joseph Weston
Hi,
I have a matrix giving me the complex wave function at each site. How do I know which mode (m/n) do the amplitudes correspond to?
Where did you get this matrix from? Is this the wavefunction of a mode in a lead, from 'kwant.modes', or of a scattering wavefunction, from 'kwant.wave_function'? Bear in mind that a mode wavefunction and a scattering wavefunction are defined in different places: a mode wavefunction is defined in the lead only (i.e. over a single unit cell, and you use Bloch's theorem to get the wavefunction in neighboring unit cells), whereas the scattering wavefunction may only be queried in the scattering region itself (even though it extends infinitely far into the leads, Kwant does not allow you to query the amplitude of a scattering wavefunction on sites the leads).
Also, I am not aware of the method to get wavenumbers k_m. Could you kindly help me out with that as well?
You can get the wavenumbers by calling 'kwant.modes' on a lead and querying the propagating modes. This contains the wavefunctions for the modes of the provided lead, as well as the wavenumbers and velocities.
Happy Kwanting,
Joe
-- *Shivang Agarwal* Junior Undergraduate Discipline of Electrical Engineering IIT Gandhinagar Contact: +91-9869321451