62 citations · 455 across the 37 of their papers we have counts for
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cond-mat.str-el2008★ 31 cited
Exact many-electron ground states on diamond and triangle Hubbard chains
Zsolt Gulacsi, Arno Kampf, Dieter Vollhardt
We construct exact ground states of interacting electrons on triangle and diamond Hubbard chains. The construction requires (i) a rewriting of the Hamiltonian into positive semidef…
cond-mat.str-el2008★ 16 cited
Delocalization effect of the Hubbard repulsion in exact terms and two dimensions
Zsolt Gulacsi
The genuine physical reasons explaining the delocalization effect of the Hubbard repulsion U are analyzed. First it is shown that always when this effect is observed, U acts on the…