Hidden local, quasi-local and non-local Symmetries in Integrable Systems

Details Hidden local, quasi-local and non-local Symmetries in Integrable Systems Hidden local, quasi-local and non-local Symmetries in Integrable Systems

2000-01-22

arxiv.org/abs/hep-th/0001151v1

Nucl.Phys. B577 (2000) 500-528

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, Latex file

Scientific paper

10.1016/S0550-3213(00)00151-6

The knowledge of {\it non usual} and sometimes {\it hidden} symmetries of (classical) integrable systems provides a very powerful setting-out of solutions of these models. Primarily, the understanding and possibly the quantisation of intriguing symmetries could give rise to deeper insight into the nature of field spectrum and correlation functions in quantum integrable models. With this perspective in mind we will propose a general framework for discovery and investigation of local, quasi-local and non-local symmetries in classical integrable systems. We will pay particular attention to the structure of symmetry algebra and to the r\^ole of conserved quantities. We will also stress a nice unifying point of view about KdV hierarchies and Toda field theories with the result of obtaining a Virasoro algebra as exact symmetry of Sine-Gordon Model.

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