Quantum coherence of the molecular states and their corresponding currents in nanoscale Aharonov-Bohm interferometers

Abstract

By considering a nanoscale Aharonov-Bohm (AB) interferometer consisting of a laterally-coupled double dot coupled to the source and drain electrodes we investigate the AB phase dependence of the bonding and antibonding states and the transport current via the bonding and antibonding state channels The relations of the AB phase dependence between the quantum states and the associated transport current components are analyzed which provides useful information for the reconstruction of quantum states through the measurement of the transport current in such systems We obtain the validity of the experimental analysis given in [Phys Rev Lett 106 076801 (2011)] that bonding state currents in different energy configurations are almost the same With the coherent properties in the quantum dot states as well as in the transport currents we also provide a way to manipulate the bonding and antibonding states through the AB magnetic flux

Date of Award	2016 Jun 16
Original language	English
Supervisor	Wei-Min Zhang (Supervisor)