triqs.operators.util.U_matrix
Functions to construct Coulomb tensors
Functions
U_J_to_radial_integrals(l, U_int, J_hund) |
Determine the radial integrals F_k from U_int and J_hund. |
U_matrix_kanamori(n_orb, U_int, J_hund[, ...]) |
Calculate the Kanamori two-index interaction matrix for parallel spins: |
U_matrix_slater(l[, radial_integrals, ...]) |
Calculate the full four-index U matrix |
angular_matrix_element(l, k, m1, m2, m3, m4) |
Calculate the angular matrix element |
clebsch_gordan(jm1, jm2, jm3) |
Calculate the Clebsh-Gordan coefficient |
cubic_names(l) |
Get the names of the cubic harmonics. |
eg_submatrix(U[, convention]) |
Extract the eg submatrix of the full d-manifold two- or four-index U matrix. |
radial_integrals_to_U_J(l, F) |
Determine U_int and J_hund from the radial integrals. |
reduce_4index_to_2index(U_4index) |
Reduces the four-index matrix to two-index matrices for parallel and anti-parallel spins. |
spherical_to_cubic(l[, convention]) |
Get the spherical harmonics to cubic harmonics transformation matrix. |
subarray(a, idxlist[, n]) |
Extract a subarray from a matrix-like object. |
t2g_submatrix(U[, convention]) |
Extract the t2g submatrix of the full d-manifold two- or four-index U matrix. |
three_j_symbol(jm1, jm2, jm3) |
Calculate the three-j symbol |
transform_U_matrix(U_matrix, T) |
Transform a four-index interaction matrix into another basis. |