The Dressing Method as Non Linear Superposition in Sigma Models

Abstract

We apply the dressing method on the Non Linear Sigma Model (NLSM), which describes the propagation of strings on $\mathbb{R}\times {\mathrm{S}}^2$, for an arbitrary seed. We obtain a formal solution of the corresponding auxiliary system, which is expressed in terms of the solutions of the NLSM that have the same Pohlmeyer counterpart as the seed. Accordingly, we show that the dressing method can be applied without solving any differential equations. In this context a superposition principle emerges: The dressed solution is expressed as a non-linear superposition of the seed with solutions of the NLSM with the same Pohlmeyer counterpart as the seed.

arXiv comment31 pages, 3 appendices

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Cited by in corpus (2)

• Solving formally the Auxiliary System of $O(N)$ Non Linear Sigma Model
• Novel aspects of integrability for NLSMs in symmetric spaces