title: Promotion of deep tunneling through molecular barriers by electronic-nuclear coupling.
abstract: Deep electronic tunneling through molecular barriers in donor-bridge-acceptor complexes is studied using an analytically solvable model. The effective tunneling matrix element is formulated as a sum over vibronic tunneling pathways. For a symmetric system the frequency of tunneling oscillations is shown to increase with the strength of electronic-nuclear coupling at the bridge, the number of electronic-nuclear coupling sites, or the frequency of a bridge vibration. Acceleration by several orders of magnitude is demonstrated within the range of realistic molecular parameters.
authors.affiliation: Department of Chemistry and The Lise Meitner Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel.
authors.forename: Musa
authors.initials: M
authors.lastname: Abu-Hilu
authors.forename: Uri
authors.initials: U
authors.lastname: Peskin