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Integrable boundary interactions for Ruijsenaars' difference Toda chain (1405.3018v1)

Published 13 May 2014 in math-ph, math.MP, and nlin.SI

Abstract: We endow Ruijsenaars' open difference Toda chain with a one-sided boundary interaction of Askey-Wilson type and diagonalize the quantum Hamiltonian by means of deformed hyperoctahedral $q$-Whittaker functions that arise as a $t=0$ degeneration of the Macdonald-Koornwinder multivariate Askey-Wilson polynomials. This immediately entails the quantum integrability, the bispectral dual system, and the $n$-particle scattering operator for the chain in question.

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