Resonance Effects in the Nonadiabatic Nonlinear Quantum Dimer

TL;DR

This paper investigates how resonance between vibrations and electronic oscillations in a quantum nonlinear dimer enhances electron transport, revealing nonlinear frequency mixing as a key mechanism through numerical analysis.

Contribution

It introduces the concept of field-induced resonance effects in a quantum nonlinear dimer and analyzes their impact on electronic transport and frequency spectra.

Findings

Resonance significantly boosts electron transport in the dimer.

Nonlinear frequency mixing governs the resonance effects.

Resonance phenomena are characterized through spectral analysis.

Abstract

The quantum nonlinear dimer consisting of an electron shuttling between the 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 initially delocalization of the electron, the 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.