N=2 and N=4 Supersymmetric mKdV and sinh-Gordon Hierarchies

Details N=2 and N=4 Supersymmetric mKdV and sinh-Gordon Hierarchies N=2 and N=4 Supersymmetric mKdV and sinh-Gordon Hierarchies

2004-09-16

arxiv.org/abs/hep-th/0409171v1

Physics

High Energy Physics

High Energy Physics - Theory

25 pages

Scientific paper

Integrable models with higher N=2 and N=4 supersymmetries are formulated on reductions of twisted loop superalgebras $\hat{sl}(2|2)$ and $\hat{sl}(4|4) $ endowed with principal gradation. In case of the $\hat{sl}(4|4)$ loop algebra a sequence of progressing reductions leads both to the N=4 and N=2 supersymmetric mKdV and sinh-Gordon equations. The reduction scheme is induced by twisted automorphism and allows via dressing approach to associate to each symmetry flow of half-integer degree a supersymmetry transformation involving only local expressions in terms of the underlying fields.

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