triqs.operators.util.U_matrix.radial_integrals_to_U_J

triqs.operators.util.U_matrix.radial_integrals_to_U_J(l, F)[source]

Determine U_int and J_hund from the radial integrals.

Parameters:

  • l (integer) – Angular momentum of shell being treated (l=2 for d shell, l=3 for f shell).

  • F (list) – Slater integrals [F0,F2,F4,..].

Returns:

  • U_int (scalar) – Value of the screened Hubbard interaction.

  • J_hund (scalar) – Value of the Hund’s coupling.