2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54611Using a field theory generalization of the spinning top motion, we construct nonabelian generalizations of the sine-Gordon theory according to each symmetric spaces. A Lagrangian formulation of these generalized sine-Gordon theories is given in terms of a deformed gauged Wess-Zumino-Witten action which also accounts for integrably perturbed coset conformal field theories. As for physical applications, we show that they become precisely the effective field theories of self-induced transparency in nonlinear optics. This provides a dictionary between field theory and nonlinear optics.5 pages, to appear in the Proceedings of the 2nd Sakharov Conference on Physics, Moscow, May, 1996High Energy Physics - Theorytext