Ruprecht-Karls-Universität Heidelberg
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Andreas Mielke
Institut für Theoretische Physik
Ruprecht-Karls Universität
Philosophenweg 19
D-69120 Heidelberg
Tel.: ++49 6221 549431 (Sekretariat)
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Andreas Mielke: Exact results for the $U=\infty$ Hubbard model
J. Phys. A: Math. Gen.25, 6507-6515 (1992) .


The 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/k-2, the ground state energy is -4 mod t mod (Ns-N). 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.


author="Andreas Mielke",
title="Exact results for the $U=\infty$ Hubbard model",
journal="J. Phys. A: Math. Gen.",

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Letzte Änderung: 15.11.2017.