Quantum Molecule in the Low Electron Limit

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DOIResolve DOI: http://doi.org/10.1016/j.physe.2006.03.015
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TypeArticle
Journal titlePhysica E: Low-dimensional Systems and Nanostructures
Volume34
Issue1-2
Pages437440; # of pages: 4
AbstractCoupled few-electron dots with incorporated quantum point-contact charge detectors have been successfully fabricated and studied both experimentally and theoretically. In this paper we focus on charge detection measurements for the regimes most relevant to spin and charge qubit applications. We first characterize the degree of coherence of a single electron trapped in the double dot by measuring the average occupation of one of the dots at equilibrium. We find that the spin degree of freedom dramatically affects the charge states when a second electron is added to the system, resulting in novel charge transfer patterns. The patterns evolve as a function of tunnel coupling and magnetic field. A nonequilibrium occupation of ground and excited states as a possible origin of the observed phenomena is investigated theoretically through extensive numerical and CI calculations of 1–3 electron states for realistic confining potentials.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12744824
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Record identifier86cf7f1c-3ce4-4744-830c-8357c3fd72f6
Record created2009-10-27
Record modified2016-05-09
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