Abstract Occupation number representation and operator-technique are used in the calculation of harmonic oscillator matrixelements for one and two centres and for equal and different frequencies. The potentials treated are generalized Gauss-potentials of the form p̑k x̑l exp{a x̑2 }, x̑k p̑l exp{a p̑2 }, and p̑k x̑l exp{a x̑ p̑} which by application of an operator identity could be reduced to the same form. Applications in nuclear and molecular physics, in molecular spectroscopy and in quantum chemistry are discussed briefly.
Advances in Molecular Spectroscopy in Condensed Phase and Quantum Chemistry
