MD NILOY KHAN wrote:

I am a new kwant user. I have made hamiltonian taking interaction from wannier90. How can I give input this device hamiltonian to kwant?

Hi, did you try a simple web search for “wannier90 kwant”? it brings up these results: https://gitlab.kwant-project.org/kwant/kwant/-/issues/370 http://www.wannier.org/download/ If you ever improve on the above, please do not hesitate to make your code accessible to others - just like we do with Kwant. Cheers Christoph