Clean up g0w0 kernel pw reduction
The goal of this MR is to stop passing around iq
, q_c
, nG
and G2G
relating to the reduction in plane-wave basis that G0W0Calculator
needs for extrapolation purposes.
Instead we use the reduced plane-wave descriptor pdr
, which is produced at the time of the plane-wave basis reduction.
This significantly simplifies the WCalculator.dyson_and_W_old
!
Edited by Thorbjørn Skovhus