Geodesic
On a possibility of using generalized Okubo operators to take into account correlations in the Hubbard model with degeneracy
Teoretičeskaâ i matematičeskaâ fizika, Tome 64 (1985) no. 1, pp. 163-170 Cet article a éte moissonné depuis la source Math-Net.Ru

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The two-orbital Hubbard modet with degeneracy and isotropic hopping integrals is considered. A systematic method is proposed for taking into account iutra-atomic correlations of the electrons by means of generalized Okubo tensor operators. The spectrum of electron excitations in a very simple case is calculated as an example. 
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     title = {On a~possibility of using generalized {Okubo} operators to take into account correlations in the {Hubbard} model with degeneracy},
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A. V. Vedyaev; V. A. Ivanov; V. E. Shilov. On a possibility of using generalized Okubo operators to take into account correlations in the Hubbard model with degeneracy. Teoretičeskaâ i matematičeskaâ fizika, Tome 64 (1985) no. 1, pp. 163-170. http://geodesic.mathdoc.fr/item/TMF_1985_64_1_a13/

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