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

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

2003-09-23

arxiv.org/abs/cond-mat/0309526v1

Phys. Rev. Lett. 91, 187401 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.91.187401

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.

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