gem.utility.utilities.U_matrix_kanamori

gem.utility.utilities.U_matrix_kanamori(n_orb, U_int, J_hund)[source]

Calculate the Kanamori U and Uprime matrices. Parameters ———- n_orb : integer

Number of orbitals in basis.

U_intscalar: Value of the screened Hubbard interaction.
J_hundscalar: Value of the Hund’s coupling.

Returns

U_matrixfloat numpy array: The four-index interaction matrix in the chosen basis.