Faces of Relativistic Toda Chain

Details Faces of Relativistic Toda Chain Faces of Relativistic Toda Chain

1996-06-22

arxiv.org/abs/hep-th/9606144v2

Int.J.Mod.Phys. A12 (1997) 2675-2724

Physics

High Energy Physics

High Energy Physics - Theory

51 pages, LaTeX, no figures (some misprints are corrected)

Scientific paper

10.1142/S0217751X97001493

We demonstrate that the generalization of the relativistic Toda chain (RTC) is a special reduction of two-dimensional Toda Lattice hierarchy (2DTL). This reduction implies that the RTC is gauge equivalent to the discrete AKNS hierarchy and, which is the same, to the two-component Volterra hierarchy while its forced (semi-infinite) variant is described by the unitary matrix integral. The integrable properties of the RTC hierarchy are revealed in different frameworks of: Lax representation, orthogonal polynomial systems, and $\tau$-function approach. Relativistic Toda molecule hierarchy is also considered, along with the forced RTC. Some applications to biorthogonal polynomial systems are discussed.

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