Bound states in the continuum driven by AC fields
Abstract
We report the formation of bound states in the continuum driven by AC fields. This system consists of a quantum ring connected to two leads. An AC side-gate voltage controls the interference pattern of the electrons passing through the system. We model the system by two sites in parallel connected to two semi-infinite lattices. The energy of these sites change harmonically with time. We obtain the transmission probability and the local density of states at the ring sites as a function of the parameters that define the system. The transmission probability displays a Fano profile when the energy of the incoming electron matches the driving frequency. Correspondingly, the local density of states presents a narrow peak that approaches a Dirac delta function in the weak coupling limit. We attribute these features to the presence of bound states in the continuum.
Cite
@article{arxiv.1301.5776,
title = {Bound states in the continuum driven by AC fields},
author = {C. González-Santander and P. A. Orellana and F. Domínguez-Adame},
journal= {arXiv preprint arXiv:1301.5776},
year = {2015}
}
Comments
5 pages, 3 figures