Recent content by FermiDIrac19

Thank you for your responses. Do you have any resources I can use to read more about this? I'm having trouble understanding the quantisation in my system. To give more info: I have a system of graphene that I simulated in the python package kwant. This has open boundary condition in one...

Can I not approximate this derivative to gain the expectaion value of momentum? (sorry for the image, the latex didn't work)

I'm confused. Could I not in a 2D eigenstate of a quantum system determine the momentum as an approxmation of a derivative in the 2D lattice of the wavefunction values?

Thank you for the reply. I should have specified that I am talking about wavefunction values in position space and determining the momentum computationally.

Well, specifically I want to determine what angle a state is in, in a quantum system. I thought this would be best determined from the x- and y- values of the momentum values of the system.

I took an introductory course on QM. But it seems I am missing some fundamental steps to understand this process.

The goal I am trying to achieve is to determine the momentum (2D) in a quantum system from the wavefunction values and the eigenergies. How would I go about this in a general manner? Any pointers to resources would be helpfull.