Dear Sam,

the answer is: it depends.

It depends what do you want to calculate with this wavefunctions.

I think you can safely calculates optical properties in RPA or BSE.

Anyway there are problem for GW calculations. When calculating the

self-energy, you want to subtract the Vxc part of the ground state calculations:

<n|Sigma_x - Vxc|n> and Yambo it is not able to perform this operation:

<n|Vxc|n>.

May it is possible to ask pwscf to write this part and then ask yambo to read it

and subtract, but a little bit of coding is needed.

Cheers,

Daniele

PS: Non local exchange-correlation potential are implemented in Yambo, but unfortunately they are not

in the GPL version. Still check is needed. May be people working on that can add more information.