Role of interactions in the far-infrared spectrum of a lateral quantum dot molecule

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2003
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-4
Series
Physical Review Letters, Volume 91, issue 18
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.
Description
Keywords
exact diagonalization, far-infrared spectrum, quantum dots
Other note
Citation
Marlo , M , Harju , A & Nieminen , R M 2003 , ' Role of interactions in the far-infrared spectrum of a lateral quantum dot molecule ' , Physical Review Letters , vol. 91 , no. 18 , 187401 , pp. 1-4 . https://doi.org/10.1103/PhysRevLett.91.187401