Recomposition

Recomposition[j, decomp]
returns the reducible operator on a space with angular momentum j corresponding to tensor decomposition decomp.
Recomposition[sys, mat]
returns the operator for atomic system sys corresponding to the matrix of tensor decompositions mat.
Recomposition[j, tens]
returns the operator that has the spherical tensor tens as the only nonzero component of its tensor decomposition.
  • A tensor decomposition is a list of spherical tensors of increasing rank.
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A tensor decomposition:
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Construct the reducible operator:
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An operator on a J=2 space that contains only the kappa=2, q=0 polarization moment in its decomposition:
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