Yambo Community Forum

Posted: **Thu Feb 25, 2021 9:49 am**

Dear Yambo developpers

I have a question on the Bethe-Salpeter equation.
Is it possible to calculate EEL spectra from the BSE?
Shouldn't one use a different BSE with L instead of \bar L ?

How does Yambo deal with this problem?

best
javad

Posted: **Thu Feb 25, 2021 10:05 am**

Dear Javad,
yes it is possible, both responses are implemented:

Code: Select all

L_kind=Lbar  ! \bar L
L_kind=full ! L

Note that the obtained eels spectra are the same, as the spectra are build consistently, what does change is the eigenvalues to the BSE, in the first case
the eigenvalues are the poles of eps_M, in the latter they are the poles of eels (1/eps_M).

Best,
Daniele

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