Ground state and collective excitations of a dipolar Bose-Einstein condensate in a bubble trap

Autor(es)

Diniz, Pedro C. . ^[1] ; Oliveira, Eduardo A. B. ^[1] ; Lima, Aristeu R. P. ^[2] ; Henn, Emanuel A. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Integracao Int Lusofonia Afro Brasileira, Campus Auroras, Acarape, Ceara - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 10, n. 1 MAR 16 2020.
• Citações Web of Science: 1

Resumo

We consider the ground state and the collective excitations of dipolar Bose-Einstein condensates in a bubble trap, i.e., a shell-shaped spherically symmetric confining potential. By means of an appropriate Gaussian ansatz, we determine the ground-state properties in the case where the particles interact by means of both the isotropic and short-range contact and the anisotropic and long-range dipole-dipole potential in the thin-shell limit. Moreover, with the ground state at hand, we employ the sum-rule approach to study the monopole, the two-, the three-dimensional quadrupole as well as the dipole modes. We find situations in which neither the virial nor Kohn's theorem can be applied. On top of that, we demonstrate the existence of anisotropic particle density profiles, which are absent in the case with repulsive contact interaction only. These significant deviations from what one would typically expect are then traced back to both the anisotropic nature of the dipolar interaction and the novel topology introduced by the bubble trap. (AU)

• Processo FAPESP: 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 18/16369-7 - Investigação de um condensado de Bose-Einstein dipolar em uma armadilha tipo bolha
• Beneficiário: Eduardo Amâncio Barbosa Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/20475-9 - Estabelecimento de um aparato experimental para o estudo de gases quânticos dipolares
• Beneficiário: Emanuel Alves de Lima Henn
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores