Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-01-16
J.Stat.Mech.0606:P06010,2006
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, 16 figures, LaTeX, Extended version
Scientific paper
10.1088/1742-5468/2006/06/P06010
The spectrum of integrable spin chains are shown to be independent of the ordering of their spins. As an application we introduce defects (local spin inhomogeneities in homogenous chains) in two-boundary spin systems and, by changing their locations, we show the spectral equivalence of different boundary conditions. In particular we relate certain nondiagonal boundary conditions to diagonal ones.
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