Eur. Phys. J. B 81, 147-153 (2011)
https://doi.org/10.1140/epjb/e2011-10982-7

Resonance effects in the nonadiabatic nonlinear quantum dimer

¹ D A Institute of Information & Communication Technology (DA-IICT), 382007 Gandhinagar, India
² Consortium of the Americas for Interdisciplinary Sciences, University of New Mexico, Albuquerque, New Mexico, 87131-1156, USA
³ Department of Physics & Astronomy, University of New Mexico, Albuquerque, New Mexico, 87131-1156, USA

Corresponding author: ^a mukesh.tiwari@gmail.com

Received: 16 December 2010
Published online: 4 May 2011

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.