"New" boundary conditions in integrable lattice models

Details "New" boundary conditions in integrable lattice models "New" boundary conditions in integrable lattice models

2001-04-09

arxiv.org/abs/hep-th/0104083v1

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, JHEP proceedings style, talk presented at the TMR conference ``Non-perturbative Quantum Effects 2000''

Scientific paper

We consider the case of an integrable quantum spin chain with ``soliton non-preserving'' boundary conditions. This is the first time that such boundary conditions have been considered in the spin chain framework. We construct the transfer matrix of the model, we study its symmetry and we find explicit expressions for its eigenvalues. Moreover, we derive a new set of Bethe ansatz equations by means of the analytical Bethe ansatz method.

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