Time correlation function and its unifying role in molecular structure anddynamics

The utility of time correlation functions computed by time evolving suitabl y chosen wave packets to studies of bound states of molecules, quasibound s tates and transition state resonances in reactive systems, photoabsorption- dissociation and resonance Raman scattering in molecules is illustrated usi ng examples from our own laboratory. The role of excited electronic states and wavefunction interference effects in influencing photoexcitation observ ables is examined using model systems.