Issue
EPL
Volume 85, Number 5, March 2009
Article Number 57008
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/85/57008
Published online 19 March 2009
EPL, 85 (2009) 57008
DOI: 10.1209/0295-5075/85/57008

Waiting time distributions of electron transfers through quantum dot Aharonov-Bohm interferometers

S. Welack1, S. Mukamel2 and YiJing Yan1

1   Department of Chemistry, Hong Kong University of Science and Technology - Kowloon, Hong Kong
2   Department of Chemistry, University of California - Irvine, CA, USA

wesv@ust.hk
yyan@ust.hk

received 6 November 2008; accepted in final form 13 February 2009; published March 2009
published online 19 March 2009

Abstract
We present an analysis of waiting time distributions of consecutive single-electron transfers through a double-quantum-dot Aharonov-Bohm interferometer. Waiting time distributions qualitatively indicate the presence of interferences and provide information on orbital-detuning and coherent interdot-electron transfer. The frequencies of interdot-transfer$\hbox{--} $induced oscillations are Aharonov-Bohm phase sensitive, while those due to level detuning are phase independent. The signature of the quantum interference in the waiting-time distribution is more apparent for weakly coupled electron transfer detectors.

PACS
73.63.Kv - Quantum dots.
74.40.+k - Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.).
73.23.Hk - Coulomb blockade; single-electron tunneling.

© EPLA 2009