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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Solitons and Josephson-type oscillations in Bose-Einstein condensates with spin-orbit coupling and time-varying Raman frequency

Texto completo
Autor(es):
Abdullaev, F. Kh [1, 2, 3] ; Brtka, M. [1, 2] ; Gammal, A. [4] ; Tomio, Lauro [5, 6]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed ABC, CCNH, BR-09210170 Santo Andre - Brazil
[2] Univ Fed ABC, CMCC, BR-09210170 Santo Andre - Brazil
[3] Uzbek Acad Sci, Phys Tech Inst, Bodomzor Yuli 2-B, Tashkent - Uzbekistan
[4] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo 4 - Brazil
[5] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo - Brazil
[6] CTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos - Brazil
Número total de Afiliações: 6
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 97, n. 5 MAY 17 2018.
Citações Web of Science: 1
Resumo

The existence and dynamics of solitons in quasi-one-dimensional Bose-Einstein condensates with spin-orbit coupling (SOC) and attractive two-body interactions are described for two coupled atomic pseudospin components with slowly and rapidly varying time-dependent Raman frequency. By varying the Raman frequency linearly in time, it was shown that ordinary nonlinear Schrodinger-type bright solitons can be converted to striped bright solitons, and vice versa. The internal Josephson oscillations between atom number of the coupled soliton components and the corresponding center-of-mass motion are studied for different parameter configurations. In this case, a mechanism to control the soliton parameters is proposed by considering parametric resonances, which can emerge when using time-varying Raman frequencies. Full-numerical simulations confirm variational analysis predictions when applied to the region where regular solitons are expected. In the limit of high frequencies, the system is described by a time-averaged Gross-Pitaevskii formalism with renormalized nonlinear and SOC parameters and modified phase-dependent nonlinearities. By comparing full-numerical simulations with averaged results, we have also studied the lower limits for the frequency of Raman oscillations in order to obtain stable soliton solutions. (AU)

Processo FAPESP: 16/17612-7 - Dinâmica de sistemas de muitos corpos IV
Beneficiário:Arnaldo Gammal
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
Beneficiário:Brett Vern Carlson
Linha de fomento: Auxílio à Pesquisa - Temático