triqs.operators.util.U_matrix.U_J_to_radial_integrals

triqs.operators.util.U_matrix.U_J_to_radial_integrals(l, U_int, J_hund)[source]

Determine the radial integrals F_k from U_int and J_hund.

Parameters:

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

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

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

Returns:

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

Return type:

list