Møller–Plesset Perturbation Theory

The MP2 method computes

\[ E^{(2)} = - \sum_{ijab} \frac{(ia|jb)[2(ia|jb)-(ib|ja)]}{\epsilon_{a}+\epsilon_{b}-\epsilon_{i}-\epsilon_{j}} \]

with the GPW method as described in DelBen2013 and DelBen2012.

MP2 is controlled via the WF_CORRELATION section.

&WF_CORRELATION
  METHOD  RI_MP2_GPW
  &WFC_GPW
    CUTOFF      300
    REL_CUTOFF  50
    EPS_FILTER  1.0E-12
    EPS_GRID    1.0E-8
  &END
  MEMORY    1200
  NUMBER_PROC  1
&END