Gap solitons in Bose-Einstein condensates in linear and nonlinear optical lattices
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2007-07-16
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Elsevier B.V.
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Properties of localized states on array of BEC confined to a potential, representing superposition of linear and nonlinear optical lattices are investigated. For a shallow lattice case the coupled mode system has been derived. We revealed new types of gap solitons and studied their stability. For the first time a moving soliton solution has been found. Analytical predictions are confirmed by numerical simulations of the Gross-Pitaevskii equation with jointly acting linear and nonlinear periodic potentials. (c) 2007 Elsevier B.V. All rights reserved.
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Physics Letters A. Amsterdam: Elsevier B.V., v. 367, n. 1-2, p. 149-155, 2007.