New boundary conditions for integrable lattices

Details New boundary conditions for integrable lattices New boundary conditions for integrable lattices

1995-03-24

arxiv.org/abs/hep-th/9503168v1

J.Phys. A28 (1995) 4639-4654

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, latex, no figures

Scientific paper

10.1088/0305-4470/28/16/020

New boundary conditions for integrable nonlinear lattices of the XXX type, such as the Heisenberg chain and the Toda lattice are presented. These integrable extensions are formulated in terms of a generic XXX Heisenberg magnet interacting with two additional spins at each end of the chain. The construction uses the most general rank 1 ansatz for the 2x2 L-operator satisfying the reflection equation algebra with rational r-matrix. The associated quadratic algebra is shown to be the one of dynamical symmetry for the A1 and BC2 Calogero-Moser problems. Other physical realizations of our quadratic algebra are also considered.

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