# irr_sph_ten.m

Single-spin irreducible spherical tensor operators T(k,m). The resulting spherical tensors are normalized in such a way as to obey the following commutation relation:

    [Lz,T_km]=m*T_km


## Syntax

    T=irr_sph_ten(mult,k)


## Arguments

    mult - multiplicity of the spin in question

k - irreducible spherical tensor rank (optional)


## Outputs

       T - a two-argument call returns a cell array of
tensors of rank k in the order of decreasing
projection. A single argument call produces
tensors of all ranks and puts them into a
cell array in the order of increasing rank.


## Notes

Operator normalization in spin dynamics is a thorny question. The only way to make the resulting formalism independent of the total spin quantum number is to impose identical commutation relations rather than equal matrix norms.