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Solitons in quasi-one-dimensional Bose-Einstein condensates with competing dipolar and local interactions

Opened Access Solitons in quasi-one-dimensional Bose-Einstein condensates with competing dipolar and local interactions
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Autor: Cuevas-Maraver, Jesús
Malomed, Boris A.
Kevrekidis, Panayotis G.
Frantzeskakis, Dimitri J.
Departamento: Universidad de Sevilla. Departamento de Física Aplicada I
Fecha: 2009
Publicado en: Physical Review A (2009, v. 79, n. 5, p. 053608:1-11)
Tipo de documento: Artículo
Resumen: We study families of one-dimensional matter-wave bright solitons supported by the competition of contact and dipole-dipole (DD) interactions of opposite signs. Soliton families are found, and their stability is investigated in the free space and in the presence of an optical lattice (OL). Free-space solitons may exist with an arbitrarily weak local attraction if the strength of the DD repulsion is fixed. In the case of the DD attraction, solitons do not exist beyond a maximum value of the local-repulsion strength. In the system which includes the OL, a stability region for subfundamental solitons is found in the second finite band gap. For the existence of gap solitons (GSs) under the attractive DD interaction, the contact repulsion must be strong enough. In the opposite case of the DD repulsion, GSs exist if the contact attraction is not too strong. Collisions between solitons in the free space are studied too. In the case of the local attraction, they merge or pass through each othe...
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Tamaño: 373.3Kb
Formato: PDF

URI: http://hdl.handle.net/11441/23408

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