Aspects of Symmetry in Sine-Gordon Theory

Details Aspects of Symmetry in Sine-Gordon Theory Aspects of Symmetry in Sine-Gordon Theory

2001-11-30

arxiv.org/abs/hep-th/0111289v1

EconfC0107094:323-331,2001

Physics

High Energy Physics

High Energy Physics - Theory

11 Latex pages

Scientific paper

As a prototype of powerful non-abelian symmetry in an Integrable System, I will show the appearance of a Witt algebra of vector fields in the SG theory. This symmetry does not share anything with the well-known Virasoro algebra of the conformal $c=1$ unperturbed limit. Although it is quasi-local in the SG field theory, nevertheless it gives rise to a local action on $N$-soliton solution variables. I will explicitly write the action on special variables, which possess a beautiful geometrical meaning and enter the Form Factor expressions of quantum theory. At the end, I will also give some preliminary hints about the quantisation.

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