# Zerofield.m

Gamma-weighted pulse-acquire sequence in zero field. Syntax:

          fid=zerofield(spin_system,parameters,H,R,K)


where H is the hamiltonian commutation superoperator, R is the relaxation superoperator and K is the chemical kinetics superoperator. The following parameters are required:

      parameters.sweep - the width of the spectral window (Hz)

      parameters.npoints  - number time steps in the simulation

      parameters.zerofill - number of points to zerofill to