
Andreas Mielke
Institut for Theoretical Physics
RuprechtKarls University
Philosophenweg 19
D69120 Heidelberg
Germany
Tel.: ++49 6221 549431 (Secretary)
Fax: ++49 6221 549331
email:
mielke@tphys.uniheidelberg.de
AbstractThe author investigates the U= infinity Hubbard model on a large class of lattices which are line graphs. The most interesting lattices in this class are line graphs of regular bipartite lattices with Ns sites and coordination number k>or=4. The ground state energy and some ground states are given. If the number of electrons N satisfies Ns>or=N>or=2Ns/k2, the ground state energy is 4 mod t mod (NsN). The ground states have no magnetic ordering, they are projections of the ground states at U=0 onto the subspace of states without doubly occupied sites.
BibTeXentry
@article{Mielke1992,
author="Andreas Mielke",
title="Exact results for the $U=\infty$ Hubbard model",
journal="J. Phys. A: Math. Gen.",
volume="25",
pages="65076515",
year="1992"
}
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Last changes: 15.11.2017.
mielke@tphys.uniheidelberg.de
