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Averaging For Solitons With Nonlinearity Management

D. E. Pelinovsky, P. G. Kevrekidis, D. J. Frantzeskakis

cond-matarXiv:cond-mat/0312056

Abstract

We develop an averaging method for solitons of the nonlinear Schrödinger equation with periodically varying nonlinearity coefficient. This method is used to effectively describe solitons in Bose-Einstein condensates, in the context of the recently proposed and experimentally realizable technique of Feshbach resonance management. Using the derived local averaged equation, we study matter-wave bright and dark solitons and demonstrate a very good agreement between solutions of the averaged and full equations.

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