Electronic exchange in quantum rings

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dc.creatorRasanen, E.
dc.creatorPittalis, S.
dc.creatorProetto, C. R.
dc.creatorGross, E. K. U.
dc.date2008-07-11
dc.date2009-02-04
dc.date.accessioned2026-07-07T12:37:09Z
dc.date.available2026-07-07T12:37:09Z
dc.descriptionQuantum rings can be characterized by a specific radius and ring width. For this rich class of physical systems, an accurate approximation for the exchange-hole potential and thus for the exchange energy is derived from first principles. Excellent agreement with the exact-exchange results is obtained regardless of the ring parameters, total spin, current, or the external magnetic field. The description can be applied as a density functional outperforming the commonly used local-spin-density approximation, which is here explicitly shown to break down in the quasi-one-dimensional limit. The dimensional crossover, which is of extraordinary importance in low-dimensional systems, is fully captured by our functional.
dc.identifierhttps://arxiv.org/abs/0807.1868
dc.identifierhttp://arxiv.org/abs/0807.1868
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218339
dc.subjectStrongly Correlated Electrons
dc.subjectMaterials Science
dc.titleElectronic exchange in quantum rings
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