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

Author(s)

Kumar, Ramavarmaraja Kishor ^[1] ; Muruganandam, Paulsamy ^{[1, 2]} ; Tomio, Lauro ^[3] ; Gammal, Arnaldo ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

^[2] Bharathidasan Univ, Dept Phys, Tiruchchirappalli 620024, Tamil Nadu - India

^[3] Univ Estadual Paulista, Inst Fis Teor, BR-01156970 Sao Paulo - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHYSICS COMMUNICATIONS; v. 1, n. 3 OCT 2017.
• Web of Science Citations: 6

Abstract

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. (AU)

• FAPESP's process: 14/01668-8 - Excitations of dipolar Bose-Einstein condensates
• Grantee: Kishor Kumar Ramavarmaraja
• Support Opportunities: Scholarships in Brazil - Post-Doctoral