For many molecular systems, quantum tunneling provides the primary channel for electron transfer
(ET) processes. The analysis of such systems requires the consideration of coherence and interference effects that may be neglected in classically dominated systems. A model system for which elastic tunneling would be symmetry forbidden is considered here. It has been previously demonstrated that inelastic tunneling allows ET in this system. Further analysis in the framework of Floquet theory reveals that interaction with a photon field may increase the probability of inelastic tunneling and thus enhance the ET rate. Also, a similar system for which elastic tunneling is modulated by inelastic interactions is developed. Analogies with solid state systems are discussed and connections with experiment are explored. Finally, a proposal for future work is elaborated.
P.S.: Horacio passed his Preliminary Exam 4 days after he gave this talk. Congratulations!