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GW implementation - spectral function


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  • From: mperez@mpi-halle.mpg.de
  • To: forum@abinit.org
  • Subject: GW implementation - spectral function
  • Date: Tue, 3 Oct 2006 14:57:33 +0200

Dear Fabien,

thanks for your reply to my question on spectral functions in the GW
implementation.

According to the formula you wrote for the spectral function A_ii=Im(G_ii),
you have to build first G(r1,r2,omega), from the FT of G(k1,k2,omega).

that is the quantity i need in order to get A(k1,k2,omega) !!!!


Unless.., it is possible that you computed A_ii from S_ii (self-energy)
___
S_ii = \
/__ii

as
1
A_ii = Im { __________________________________ }
(omega - epsilon_i) - S_ii(omega)


where in the code can i find then G(k1,k2,omega)?, (interacting and
Kohn-Sham, if available)

thanks

Manolo


PD the formula is from your PhD thesis!



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