triqs_ctint.post_process.chiAB_from_chi2_PP

triqs_ctint.post_process.chiAB_from_chi2_PP()

Dispatched C++ function(s).

[1] (chi2pp_tau: Block2Gf[MeshImTime, 4],
     gf_struct: [tuple[str, int]],
     A_op_vec: [Operator],
     B_op_vec: [Operator])
  -> Gf[MeshImTime, 2]

Calculate the operator-pair correlation function \(\chi_{AB}\) in the particle-particle channel.

Contracts the two-point correlator \(\chi^{(2)}_{pp}\) with the operator pairs \(A\) and \(B\) to form \(\chi_{AB}(\tau)\).

Parameters:

chi2pp_tauBlock2Gf[MeshImTime, 4]

The two-point correlator \(\chi^{(2)}_{pp}(\tau)\) in the particle-particle channel.

gf_struct[tuple[str, int]]

The block structure of the Green’s function.

A_op_vec[Operator]

The list of operators \(A\).

B_op_vec[Operator]

The list of operators \(B\).

Returns:

Gf[MeshImTime, 2]

The operator-pair correlation function \(\chi_{AB}(\tau)\).