triqs.operators.util.U_matrix.radial_integrals_to_U_J

triqs.operators.util.U_matrix.radial_integrals_to_U_J(l, F)

Compute U_int and J_hund from the radial Slater integrals.

Parameters:

lint

Angular momentum of the shell being treated (l=2 for a d shell, l=3 for an f shell).

Flist of float

Slater integrals [F0, F2, F4, ...].

Returns:

U_intfloat

Value of the screened Hubbard interaction.

J_hundfloat

Value of the Hund’s coupling.