triqs_modest.misc.double_counting

triqs_modest.misc.double_counting()

Dispatched C++ function(s).

[1] (density_matrix: ndarray[ndarray[complex, 2], 2],
     U_int: float,
     J_hund: float,
     method: str)
  -> tuple[ndarray[ndarray[float, 2], 2], ndarray[float, 2]]

Compute double counting correction for a DC type (method) from the density matrix of a Green’s function.

Parameters:

density_matrixndarray[ndarray[complex, 2], 2]

Density matrix [orbital, spin] indices.

U_intfloat

Coulomb interaction parameter.

J_hundfloat

Hund’s coupling interaction parameter.

methodstr

DC formula (sFLL, cFLL, sAMF, cAMF, cHeld).

Returns:

tuple[ndarray[ndarray[float, 2], 2], ndarray[float, 2]]

A pair of \(\Sigma_{DC}\) and \(E_{DC}\).