| Texto completo | |
| Autor(es): |
Cheng, Yongshan
[1, 2]
Número total de Autores: 1
|
| Afiliação do(s) autor(es): | [1] Hubei Normal Univ, Dept Phys, Huangshi 435002 - Peoples R China
[2] Univ Estadual Paulista, Inst Fis Teor, BR-01405900 Sao Paulo - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 42, n. 20 OCT 28 2009. |
| Citações Web of Science: | 15 |
| Resumo | |
The interaction of two coupled binary matter wave bright solitons is investigated by means of the variational approach in the presence of spatially varying nonlinearity. The effective potential characterizing the interaction between the two solitons is obtained. It is shown that the effective potential is composed of three parts, related to the spatially modulated nonlinearity, the external trapping potential and the interaction of the two coupled solitons. The spatially modulated nonlinearity induces a pseudo-potential and the solitons can be accelerated by the spatially modulated nonlinearity. The effect depends on the sign and value of the spatially modulated coefficient. The interaction of two coupled binary matter wave bright solitons is of short range, and may be attractive or repulsive depending on the sign of the interspecies interactions. Under the appropriate condition, the two coupled solitons can evolve stably and do not coalesce. The neighbouring binary Bose-Einstein condensates are also available as media to create symbiotic bright solitons. The validity of the theoretical predictions is verified by the numerical integration of the coupled Gross-Pitaevskii equations. (AU) | |
| Processo FAPESP: | 08/53979-6 - Dynamics of solitons in Bose-Einstein condensate and magnetic films |
| Beneficiário: | Yongshan Cheng |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |