(Quantum) twisted Yangians: symmetry, Baxterisation and centralizers

Details (Quantum) twisted Yangians: symmetry, Baxterisation and centralizers (Quantum) twisted Yangians: symmetry, Baxterisation and centralizers

2006-11-13

arxiv.org/abs/math-ph/0611030v2

J.Math.Phys.48:023511,2007

Physics

Mathematical Physics

23 pages, Latex. Minor typos correted, acknowledgments added. J. Math. Phys. Vol. 48 (2007), to appear

Scientific paper

10.1063/1.2437851

Based on the (quantum) twisted Yangians, integrable systems with special boundary conditions, called soliton non-preserving (SNP), may be constructed. In the present article we focus on the study of subalgebras of the (quantum) twisted Yangians, and we show that such a subalgebra provides an exact symmetry of the rational transfer matrix. We discuss how the spectrum of a generic transfer matrix may be obtained by focusing only on two types of special boundaries. It is also shown that the subalgebras, emerging from the asymptotics of tensor product representations of the (quantum) twisted Yangian, turn out to be dual to the (quantum) Brauer algebra. To deal with general boundaries in the trigonometric case we propose a new algebra, which also provides the appropriate framework for the Baxterisation procedure in the SNP case.

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