frqoffset.m

Adds omega*Lz Zeeman frequency offsets to the Hamiltonian; this is useful in liquid state NMR experiments.

Syntax

    H=frqoffset(spin_system,H,parameters)

Parameters

                  H - Hamiltonian operator or commutati-
                      on superoperator

   parameters.spins - a cell array giving the spins that
                      the offsetrs should be applied to,
                      e.g. {'1H','13C'}

  parameters.offset - a cell array giving Zeeman offsets
                      on each of the spins listed in pa-
                      rameters.spins array.

Outputs

                  H - Hamiltonian operator or commutati-
                      on superoperator

Examples

This function is often called from Spinach context functions to prepare the Hamiltonian. See, for example, liquid.m context.

Notes

Offset transformation of this kind is an approximation, use rotframe.m or intrep.m if a rigorous treatment of second order effects is required.

See also

carrier.m, rotframe.m, intrep.m, operator.m, liquid.m, average.m, Kernel_functions

Version 2.2, authors: Ilya Kuprov