Integrable Deformations of Strings on Symmetric Spaces

Understand

A general class of deformations of integrable sigma-models with symmetric space F/G target-spaces are found.

• These deformations involve defining the non-abelian T dual of the sigma-model and then replacing the coupling of the Lagrange multiplier imposing flatness with a gauged F/F WZW model.
• The original sigma-model is obtained in the limit of large level.
• The resulting deformed theories are shown to preserve both integrability and the equations-of-motion, but involve a deformation of the symplectic structure.