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Spatial separation of rotating binary Bose-Einstein condensates by tuning the dipolar interactions

Texto completo
Autor(es):
Kumar, Ramavarmaraja Kishor [1, 2] ; Tomio, Lauro [3, 2] ; Gammal, Arnaldo [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil
[2] Univ Estadual Paulista, Inst Fis Teor, BR-01156970 Sao Paulo, SP - Brazil
[3] DCTA, Inst Tecnol Aeronaut, BR-12228900 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 99, n. 4 APR 4 2019.
Citações Web of Science: 0
Resumo

We are pointing out relevant anisotropic effects, related to spatial separation and miscibility, due to dipole-dipole interactions in rotating binary dipolar Bose-Einstein condensates by considering symmetric (Dy-164-Dy-162) and asymmetric (Er-168-Dy-164, Dy-164-Rb-87) dipolar mixtures. The binary mixtures are kept in a strong pancake-shaped trap, with repulsive two-body interactions and fixed rotation, modeled by an effective two-dimensional coupled Gross-Pitaevskii equation. The anisotropy of the dipolar interactions on miscibility and vortex-lattice structures is studied by tuning the dipole-dipole interaction (DDI) from repulsive to attractive by varying the dipole polarization angle. A clear spatial separation is verified in the densities for attractive DDI, when the interto intraspecies contact interaction ratio is larger than 1, being angular for symmetric mixtures and radial for asymmetric ones. The signature of hidden vortices is evidenced in the particular dipolar-symmetric case. Another relevant outcome is the observed mass-imbalance sensibility verified by the vortex-pattern binary distributions in symmetric and asymmetric-dipolar mixtures, which requires the use of a relation for nonhomogeneous mixtures to estimate the miscibility of two components. (AU)

Processo FAPESP: 14/01668-8 - Excitações de Condensados de Bose-Einstein com interação dipolar
Beneficiário:Kishor Kumar Ramavarmaraja
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 16/17612-7 - Dinâmica de sistemas de muitos corpos IV
Beneficiário:Arnaldo Gammal
Linha de fomento: Auxílio à Pesquisa - Temático