Caetano, D. P.Cavalcanti, S. B.Hickmann, J. M.Kamchatnov, A. M.Kraenkel, R. A. [UNESP]Makarova, E. A. [UNESP]2022-04-292022-04-292003-01-01Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, v. 67, n. 4, p. 5-, 2003.1063-651Xhttp://hdl.handle.net/11449/228444Using a variational approach we have studied the shape preserving coherent propagation of light pulses in a resonant dispersive medium in the presence of the Kerr nonlinearity. Within the framework of a combined nonintegrable system composed of one nonlinear Schrödinger and a pair of Bloch equations, we show the existence of a solitary wave. We have tested our analytical solution through numerical simulations confirming its solitary wave nature. © 2003 The American Physical Society.5engArtigo10.1103/PhysRevE.67.0466152-s2.0-85037188271