Boundary remnant of Yangian symmetry and the structure of rational reflection matrices

Details Boundary remnant of Yangian symmetry and the structure of rational reflection matrices Boundary remnant of Yangian symmetry and the structure of rational reflection matrices

2001-09-14

arxiv.org/abs/hep-th/0109115v2

Phys.Lett. B522 (2001) 335-344; Erratum-ibid. B524 (2002) 401

Physics

High Energy Physics

High Energy Physics - Theory

13 pages. Role of U(1) factor corrected in v2; results are unchanged

Scientific paper

10.1016/S0370-2693(01)01275-8

For the classical principal chiral model with boundary, we give the subset of the Yangian charges which remains conserved under certain integrable boundary conditions, and extract them from the monodromy matrix. Quantized versions of these charges are used to deduce the structure of rational solutions of the reflection equation, analogous to the 'tensor product graph' for solutions of the Yang-Baxter equation. We give a variety of such solutions, including some for reflection from non-trivial boundary states, for the SU(N) case, and confirm these by constructing them by fusion from the basic solutions.

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