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Correlation order selection function - keeps only the specified orders of spin correlation in the state vector. This is useful as a replacement for gradients and phase cycles because correlation order filtering can be accomplished analytically, by just picking out the required correlation orders and zeroing everything else.




  rho     -  a state vector or a horizontal stack thereof

  orders  -  a row vector of correlation orders to keep

  spins   -  which spins to consider (e.g. '1H', '13C', 'all')


  rho     - the state vector with the undesired orders of
            spin correlations zeroed out


Because quantum number information is required for this function to work, it is restricted to sphten-liouv formalism. It supports Fokker-Planck direct products.

See also

coherence.m, decouple.m, homospoil.m

Version 2.2, authors: Ilya Kuprov, Luke Edwards