Three-magnon bound states in exactly rung-dimerized spin ladders

Details Three-magnon bound states in exactly rung-dimerized spin ladders Three-magnon bound states in exactly rung-dimerized spin ladders

2010-03-17

arxiv.org/abs/1003.3472v2

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages

Scientific paper

Three magnon bound states in all total spin sectors of general nonintegrable exactly rung-dimerized spin ladder are obtained by Bethe Ansatz. Basing on this result a dispersion law for $m$-magnon ($m>3$) bound states is conjectured. It is suggested that (depending on correlations between coupling constants) a behavior of the gas parameter (density of rung-triplets) on the boundary of the rung-dimerized phase may either be smooth or have a leap.

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