Symmetry breaking, Josephson oscillation and self-trapping in a self-bound three-dimensional quantum ball

Autor(es)

Adhikari, S. K.

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 7, NOV 22 2017.
• Citações Web of Science: 1

Resumo

We study spontaneous symmetry breaking (SSB), Josephson oscillation, and self-trapping in a stable, mobile, three-dimensional matter-wave spherical quantum ball self-bound by attractive two-body and repulsive three-body interactions. The SSB is realized by a parity-symmetric (a) one-dimensional (1D) double-well potential or (b) a 1D Gaussian potential, both along the z axis and no potential along the x and y axes. In the presence of each of these potentials, the symmetric ground state dynamically evolves into a doubly-degenerate SSB ground state. If the SSB ground state in the double well, predominantly located in the first well (z > 0), is given a small displacement, the quantum ball oscillates with a self-trapping in the first well. For a medium displacement one encounters an asymmetric Josephson oscillation. The asymmetric oscillation is a consequence of SSB. The study is performed by a variational and a numerical solution of a non-linear mean-field model with 1D parity-symmetric perturbations. (AU)

• Processo FAPESP: 12/00451-0 - Estudo de propriedades do condensado de Bose-Einstein: átomos dipolares e condensado de férmions
• Beneficiário: Sadhan Kumar Adhikari
• Modalidade de apoio: Auxílio à Pesquisa - Temático