The wavefunction renormalization constant for the one- and two- band Hubbard hamiltonians in two dimensions

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dc.creatorLouis, E.
dc.creatorChiappe, G.
dc.creatorGalan, J.
dc.creatorGuinea, F.
dc.creatorVerges, J. A.
dc.date1994-03-02
dc.date.accessioned2026-07-25T23:32:58Z
dc.descriptionThe wavefunction renormalization in the Hubbard model is studied, by using well tested mean field tecniques. The 'orthogonality catastrophe' is shown to exist, even in 2D, for doping levels sufficiently close to half filling. The results are extended beyond mean field, by constructing delocalized wavefunctions, with the correct symmetries of the exact solutions. The physics are still well described by the assumption of the existence of the orthogonality catastrophe.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/9403007
dc.identifierhttp://arxiv.org/abs/cond-mat/9403007
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/99382
dc.subjectCondensed Matter
dc.titleThe wavefunction renormalization constant for the one- and two- band Hubbard hamiltonians in two dimensions
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