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cond-mat1996
Ferromagnetism in an itinerant electron system: Hubbard model on complete graph
D. F. Wang
In this work, the ground states of the Hubbard model on complete graph are studied, for a finite lattice size and arbitrary on-site energy . We construct explicitly the grou…
cond-mat1996
A remark on off-diagonal long range order
C. A. Piguet, D. F. Wang, C. Gruber
In this work, we study some general property of a strongly correlated electron system defined on a lattice. Assuming that the lattice system exhibits off-diagonal long range order,…