“…To recover the missing T c [ρ] component, one can combine W 1 MRF [ρ]
with the quantities from the weak coupling limit, namely, W 0 [ρ] and W 0 ′ [ρ],
to interpolate W λ [ρ] and thus
obtain E xc [ρ]. For this purpose,
we employ a very simple interpolation form, the two-legged representation, 14,29,68 which has recently been used
to construct a tight lower bound to correlation energies. 29 This form reads as![]()
As in this work, we use W 1 MRF [ρ]
as an approximation to W 1 [ρ], we
call this approach the “2-leg MRF”, and from Figure 4 we can see that
it substantially improves the MRF-1 energies.…”