Équipe de Recherche en Physique de l'Information Quantique


Abstract = {We report the first experimental realization of a semiconductor triple quantum dot system in a few electrons regime. Charging properties of this "artificial tri-atom" are studied using non-invasive charge detection technique. The most fundamental configuration was initialized in which a single electron is shared resonantly between the three dots and also equivalent arrangements involving two or three electrons. Using gates we are able to tune through the quadruple points, a unique feature of triple dot systems. At a quadruple point the quantum states in all three dots resonantly coincide with each other and with the chemical potential of the leads. Unexpectedly, novel charge re-arrangement lines were observed in vicinity of quadruple points. The observed charge re-arrangement can be viewed as a basic realization of quantum cellular automata in the few electron regime. Such phenomenon may be expected for all multiple quantum dot systems greater than two, in which a change in the state of one dot may instantaneously trigger a charge rearrangement of the system. The results may lead to new opportunities for fundamental physics research and for other applications, e.g. quantum computing. {\copyright} 2006 Crown Copyright.},
Art_Number = {1717248},
Author = {Studenikin, S. and Gaudreau, L. and Sachrajda, A. and Zawadzki, P. and Kam, A. and Lapointe, J. and Korkusinski, M. and Hawrylak, P.},
Document_Type = {Conference Paper},
Journal = {2006 6th IEEE Conference on Nanotechnology, IEEE-NANO 2006},
Pages = {871-874},
Source = {Scopus},
Title = {Charging characteristics of a few electron triple lateral quantum dot system in GaAs/AlGaAs},
Url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-42549128704&partnerID=40&md5=80e69dd9c66fe7780e294c3988b83340},
Volume = {2},
Year = {2006},
Bdsk-Url-1 = {http://www.scopus.com/inward/record.url?eid=2-s2.0-42549128704&partnerID=40&md5=80e69dd9c66fe7780e294c3988b83340}}