Separation of variables for the Ruijsenaars system

Details Separation of variables for the Ruijsenaars system Separation of variables for the Ruijsenaars system

1997-01-10

arxiv.org/abs/solv-int/9701004v1

Commun.Math.Phys. 189(1997) 855-877

Physics

High Energy Physics

High Energy Physics - Theory

26 pages, LaTex, no figures

Scientific paper

10.1007/s002200050231

We construct a separation of variables for the classical n-particle Ruijsenaars system (the relativistic analog of the elliptic Calogero-Moser system). The separated coordinates appear as the poles of the properly normalised eigenvector (Baker-Akhiezer function) of the corresponding Lax matrix. Two different normalisations of the BA functions are analysed. The canonicity of the separated variables is verified with the use of r-matrix technique. The explicit expressions for the generating function of the separating canonical transform are given in the simplest cases n=2 and n=3. Taking nonrelativistic limit we also construct a separation of variables for the elliptic Calogero-Moser system.

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