add_spins.m

Reduction of direct products of two su(2) irreps.

Syntax

    [mult,proj]=add_spins(spin_a,spin_b)

Parameters

    spin_a  - quantum number of the first spin,
              an integer or a half-integer

    spin_b  - quantum number of the second spin,
              an integer or a half-integer

Outputs

    mult    - multiplicities corresponding to
              the values of the total spin that
              are present

    proj    - projectors that reduce the direct
              product representation, a cell ar-
              ray of matrices

See also

pauli.m, wigner.m, stevens.m, irr_sph_ten.m, operator.m, state.m, cg_fast.m, clebsch_gordan.m, comm.m, hilb2liouv.m, ist_product_table.m, lorentz.m, mat2sphten.m, multipack.m, perm_group.m, rocomm.m, rwalk.m, sle_operators.m, sorensen.m, spher_harmon.m, sphten2mat.m, stev2sph.m, superop.m, twospinist.m, wigner_3j.m, wigner_6j.m, Kernel_utilities

Version 2.8, authors: Ilya Kuprov