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American Physical Society, Physical Review Letters, 18(91), 2003

DOI: 10.1103/physrevlett.91.187401

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Role of Interactions in the Far-Infrared Spectrum of a Lateral Quantum-Dot Molecule

Journal article published in 2003 by M. Marlo, A. Harju ORCID, Risto M. Nieminen
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This paper is available in a repository.

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Abstract

We study the effects of electron-electron correlations and confinement potential on the far-infrared spectrum of a lateral two-electron quantum dot molecule by exact diagonalization. The calculated spectra directly reflect the lowered symmetry of the external confinement potential. Surprisingly, we find interactions to drive the spectrum towards that of a high-symmetry parabolic quantum dot. We conclude that far-infrared spectroscopy is suitable for probing effective confinement of the electrons in a quantum dot system, even if interaction effects cannot be resolved in a direct fashion. ; Comment: 4 pages, 2 figures