Exact ground states of generalized Hubbard models

Abstract

We present a simple method for the construction of exact ground states of generalized Hubbard models in arbitrary dimensions. This method is used to derive rigorous criteria for the stability of various ground state types, like the $\eta$-pairing state, or Néel and ferromagnetic states. Although the approach presented here is much simpler than the ones commonly used, it yields better bounds for the region of stability.

Revtex, 8 pages

References in corpus (4)

• Matrix-product-groundstates for one-dimensional spin-1 quantum antiferromagnets
• $\eta$-pairing as a mechanism of superconductivity in models of strongly correlated electrons
• Superconductivity in an exactly solvable Hubbard model with bond-charge interaction
• Off-Diagonal Long-Range Order: Meissner Effect and Flux Quantization

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