Citation:
Heller, E.J. Frozen Gaussians: A very simple semiclassical approximation. J. Chem. Phys. 75, 2923 (1981).
Abstract:
A new and convenient semiclassical method is proposed. It relies only upon classical trajectories and Gaussian integrals. It seems to work very well for the model molecular vibrational spectra investigated here. It should be applicable to a wide variety of processes and can be variationally improved if necessary.