Sine-Gordon Equation and Representations of Affine Kac-Moody Algebra \hat{sl_2}

Details Sine-Gordon Equation and Representations of Affine Kac-Moody Algebra \hat{sl_2} Sine-Gordon Equation and Representations of Affine Kac-Moody Algebra \hat{sl_2}

1999-10-26

arxiv.org/abs/hep-th/9910204v1

Physics

High Energy Physics

High Energy Physics - Theory

23 pages

Scientific paper

The goal of this paper is to give a representation-theoretic interpretation of the sine-Gordon equation. We consider a vertex operator representation of affine Kac-Moody algebra \hat{sl_2} on the space of differential operators. In this formulation, the tau-function becomes a function of non-commuting variables. Using the skew Casimir operators, we obtain a hierarchy of equations in Hirota form that contains sine-Gordon, KdV and mKdV equations and construct their soliton solutions.

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