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Obtaining momentum distibution from Green's functions

 
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Mar29-12, 09:39 PM   #1
 

Obtaining momentum distibution from Green's functions

How does one obtain the momentum distribution (n_k) from the green functions Is there a software for it if so where can I get it
Thanks
Emman1
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Mar30-12, 06:53 AM   #2
 
Momentum of what, in which system and under what conditions?

Does this help?

http://www2.fz-juelich.de/nic-series...avropoulos.pdf
May2-12, 12:02 PM   #3
 
I am working on electron correlation in an 8 X8(64 site) square lattice at half filling using the 2-D Hubbard model. using quantum monte Carlo I was able to obtain the Green functions. To get the momentum distribution I am required to calculate the Fourier transform of the Green function. The problem is I do not know how to go about calculating the Green functions and plotting it. Can it be done with Matlab?
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