extracting scattering states momenta with Kwant
Dear Kwant developers, I was wondering if there were any examples of extracting the momenta of the scattering states? I have found several functions in the documentation that seem to cover what I would like to do, however, I have not managed to implement them, unfortunately. To be more specific, my problem is such that there are 'bands' in the left lead, and I would like to see how many scattering states (+their momenta) Kwant finds at a given value of the chemical potential in the lead. Thank you in advance for your help! Cheers, Vardan.
Dear Vardan, Yes you can get this information. One way is to to use kwant-spectrum (https://kwant-project.org/extensions/kwantspectrum/ <https://kwant-project.org/extensions/kwantspectrum/>) to tag the different channels to their momentum and velocities. (someone contradicts me if there is a simpler way, probably) Best, Xavier
Le 17 nov. 2020 à 17:04, Vardan Kaladzhyan <vardan.kaladzhyan@phystech.edu> a écrit :
Dear Kwant developers,
I was wondering if there were any examples of extracting the momenta of the scattering states? I have found several functions in the documentation that seem to cover what I would like to do, however, I have not managed to implement them, unfortunately.
To be more specific, my problem is such that there are 'bands' in the left lead, and I would like to see how many scattering states (+their momenta) Kwant finds at a given value of the chemical potential in the lead.
Thank you in advance for your help!
Cheers, Vardan.
Hi Vardan, This information is stored in the scattering matrix in the lead_info attribute (see https://kwant-project.org/doc/1/reference/generated/kwant.solvers.common.SMa...) in the format described here: https://kwant-project.org/doc/1/reference/generated/kwant.physics.Propagatin... Hope that helps, Anton On Tue, 17 Nov 2020 at 17:07, Vardan Kaladzhyan <vardan.kaladzhyan@phystech.edu> wrote:
Dear Kwant developers,
I was wondering if there were any examples of extracting the momenta of the scattering states? I have found several functions in the documentation that seem to cover what I would like to do, however, I have not managed to implement them, unfortunately.
To be more specific, my problem is such that there are 'bands' in the left lead, and I would like to see how many scattering states (+their momenta) Kwant finds at a given value of the chemical potential in the lead.
Thank you in advance for your help!
Cheers, Vardan.
Dear Xavier and Anton, Thank you a lot for your quick replies! I will try to implement it using your tips! Cheers, Vardan. On Tue, 17 Nov 2020 at 17:45, Anton Akhmerov <anton.akhmerov+kd@gmail.com> wrote:
Hi Vardan,
This information is stored in the scattering matrix in the lead_info attribute (see https://kwant-project.org/doc/1/reference/generated/kwant.solvers.common.SMa... ) in the format described here:
https://kwant-project.org/doc/1/reference/generated/kwant.physics.Propagatin...
Hope that helps, Anton
On Tue, 17 Nov 2020 at 17:07, Vardan Kaladzhyan <vardan.kaladzhyan@phystech.edu> wrote:
Dear Kwant developers,
I was wondering if there were any examples of extracting the momenta of
the scattering states? I have found several functions in the documentation that seem to cover what I would like to do, however, I have not managed to implement them, unfortunately.
To be more specific, my problem is such that there are 'bands' in the
left lead, and I would like to see how many scattering states (+their momenta) Kwant finds at a given value of the chemical potential in the lead.
Thank you in advance for your help!
Cheers, Vardan.
participants (3)
-
Anton Akhmerov -
Vardan Kaladzhyan -
Xavier Waintal