期刊
PHYSICA D-NONLINEAR PHENOMENA
卷 238, 期 15, 页码 1372-1387出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physd.2008.09.008
关键词
Nonlinear dynamics; Gap-solitons; Localized modes; Bose-Einstein condensates; Bose-Bose mixtures
资金
- FCT [SFRH/BD/23283/2005]
- FEDER [POCI/FIS/56237/2004]
- Centro de Fisica Teorica e Computacional, Universidade de Lisboa
- Fundação para a Ciência e a Tecnologia [SFRH/BD/23283/2005, POCI/FIS/56237/2004] Funding Source: FCT
We investigate, both analytically and numerically, the conditions for the occurrence of the delocalizing transition phenomenon of one-dimensional localized modes of several nonlinear continuous periodic and discrete systems of the nonlinear Schrodinger type. We show that either non-existence of solitons in the small amplitude limit or the loss of stability along existence branches can lead to delocalizing transitions, which occur following different scenarios. Examples of delocalizing transitions of both types are provided for a class of equations which describe single component and binary mixtures of Bose-Einstein condensates trapped in linear and nonlinear optical lattices. (C) 2008 Elsevier B.V. All rights reserved.
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