Abstract
We define the notion of C (2) N+1Ruijsenaars–Schneider models and construct their Lax formulation. They are obtained by a particular folding of the A 2N+1 systems. Their commuting Hamiltonians are linear combinations of Koornwinder–van Diejen ‘external fields’ Ruijsenaars–Schneider models, for specific values of the exponential one-body couplings but with the most general two double-poles structure as opposed to the formerly studied BC N case. Extensions to the elliptic potentials are briefly discussed.
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Avan, J., Rollet, G. C (2) N+1 Ruijsenaars–Schneider Models. Letters in Mathematical Physics 60, 177–189 (2002). https://doi.org/10.1023/A:1016127325294
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DOI: https://doi.org/10.1023/A:1016127325294