Miscibility in coupled dipolar and non-dipolar Bose-Einstein condensates

• Autor(a) principal: Kumar, Ramavarmaraja Kishor
• Data de Publicação: 2017
• Outros Autores: Muruganandam, Paulsamy, Tomio, Lauro [UNESP], Gammal, Arnaldo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1088/2399-6528/aa8db5; http://hdl.handle.net/11449/164302
• topic: ultracold trapped gases; multicomponent dipolar condensates; miscibility; matter wavers

We perform a full three-dimensional study on miscible-immiscible conditions for coupled dipolar and non-dipolar Bose-Einstein condensates (BEC), confined in anisotropic traps. In view of recent experimental studies, our focus was the atomic erbium-dysprosium (Er-168-Dy-164) and dysprosium-dysprosium (Dy-164-Dy-162) mixtures. The miscibility is quantified by the overlap of the two-component densities, using an appropriate defined parameter. By verifying that stable regimes for pure-dipolar coupled BECs are only possible in pancake-type traps, we obtain some non-trivial local minimum biconcave-shaped states with density oscillations in both components. For non-dipolar systems with repulsive interactions, we show that immiscible stable configurations are also possible in cigar-type geometries. The main role of the trap aspect ratio and inter-species contact interaction for the miscibility is verified for different configurations, from non-dipolar to pure dipolar systems.