Effect of curve crossing on absorption and resonance Raman spectra: analytical treatment for delta-function coupling in parabolic potentials

Abstract

We propose an exactly solvable model for the two-state curve-crossing problem. Our model assumes the coupling to be a delta function. It is used to calculate the effect of curve crossing on the electronic absorption spectrum and the resonance Raman excitation profile.

Keywords:

• ab initio
• electronic structure
• quantum chemistry
• computational chemistry

Acknowledgements

The author thanks Prof. K.L. Sebastian for providing the idea of solving this problem and also for valuable suggestions. The author also thanks Prof. M.S. Child, Prof. H. Nakamura, Prof. J.A. Cina and Prof. M.E. Kellman for their comments on an earlier version of the manuscript.