Consistent refinement of Bethe strings for spin and electron models and a new non-Bethe solution

Details Consistent refinement of Bethe strings for spin and electron models and a new non-Bethe solution Consistent refinement of Bethe strings for spin and electron models and a new non-Bethe solution

2001-08-10

arxiv.org/abs/cond-mat/0108175v2

Physics

Condensed Matter

Latex 7 pages + 2 figs., version to be published in J. Phys. A

Scientific paper

10.1088/0305-4470/35/10/101

Well known Bethe strings in spin chains, delta-electron gas, Hubbard and t-J
models are shown to be imprecise, while their consisten refinement along with a
new non-Bethe r-string are discovered. Connection with the earlier results is
established and the string hypothesis problem is discussed in the light of the
present findings.

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