62 citations · 149 across the 8 of their papers we have counts for
Showing 2007Show all
2 papers · 1 filter
cond-mat.str-el2007★ 2 cited
Quadratic operators used in deducing exact ground states for correlated systems: ferromagnetism at half filling provided by a dispersive band
Istvan Chalupa, Zsolt Gulacsi
Quadratic operators are used in transforming the model Hamiltonian (H) of one correlated and dispersive band in an unique positive semidefinite form coopting both the kinetic and i…
cond-mat.str-el2007★ 62 cited
Exact many-electron ground states on the diamond Hubbard chain
Zsolt Gulacsi, Arno Kampf, Dieter Vollhardt
Exact ground states of interacting electrons on the diamond Hubbard chain in a magnetic field are constructed which exhibit a wide range of properties such as flat-band ferromagnet…