Few-electron quantum dots for quantum computing

Details Few-electron quantum dots for quantum computing Few-electron quantum dots for quantum computing

2003-09-08

arxiv.org/abs/cond-mat/0309205v1

Nanotechnology 15, 609-613 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 5 figures. Website at http://meso.deas.harvard.edu

Scientific paper

10.1088/0957-4484/15/5/035

Two tunnel-coupled few-electron quantum dots were fabricated in a GaAs/AlGaAs quantum well. The absolute number of electrons in each dot could be determined from finite bias Coulomb blockade measurements and gate voltage scans of the dots, and allows the number of electrons to be controlled down to zero. The Zeeman energy of several electronic states in one of the dots was measured with an in-plane magnetic field, and the g-factor of the states was found to be no different than that of electrons in bulk GaAs. Tunnel-coupling between dots is demonstrated, and the tunneling strength was estimated from the peak splitting of the Coulomb blockade peaks of the double dot.

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