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3
votes
1answer
160 views

S-Matrix and normalization of states

I'm trying to understand what is the S-matrix in QFT. People say that it has to be a unitary matrix, but that I guess will change with a different normalization of the incoming and outgoing states. My ...
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0answers
106 views

Corrections and Normalization for Power Spectrum Calculation

So I'm hoping I can get some help. I have a 2d image and need to get the 1d power spectrum. I know the basic steps: take fft, take fft^2 to get power, then take average power in radial bins to get 1d ...
0
votes
0answers
60 views

Setting the normalization volume to 1

In graphene, free electrons can have the following wavefunctions (there are other options, with minus signs in various places, but this will serve as an example): ...