Resonance effects in the nonadiabatic nonlinear quantum dimer

Abstract

The quantum nonlinear dimer consisting of an electron shuttling between two sites and in�weak�interaction with vibrations, is studied numerically under the application of a DC electric field. A field-induced resonance phenomenon between the vibrations and the electronic oscillations is found to influence the electronic transport greatly. For initial delocalization of the electron, resonance has the effect of a dramatic increase in the transport. Nonlinear frequency mixing is identified as the main mechanism that influences transport. A characterization of the frequency spectrum is also presented.