| Full text | |
| Author(s): |
Kumar, Ramavarmaraja Kishor
;
Tomio, Lauro
;
Malomed, Boris A.
;
Gammal, Arnaldo
Total Authors: 4
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW A; v. 96, n. 6, p. 9-pg., 2017-12-29. |
| Abstract | |
We study the structure and stability of vortex lattices in two-component rotating Bose-Einstein condensates with intrinsic dipole-dipole interactions and contact interactions. To address experimentally accessible coupled systems, we consider Dy-164-Dy-162 and Er-168-Dy-164 mixtures, which feature different miscibilities. The corresponding dipole moments are mu(Dy) = 10 mu(B) and mu(Er) = 7 mu(B), where mu(B) is the Bohr magneton. For comparison we also discuss a case where one of the species is nondipolar. Under a large aspect ratio of the trap, we consider mixtures in the pancake-shaped format, which are modeled by effective two-dimensional coupled Gross-Pitaevskii equations, with a fixed polarization of the magnetic dipoles. Then, the miscibility and vortex-lattice structures are studied by varying the coefficients of the contact interactions (assuming the use of the Feshbach-resonance mechanism) and the rotation frequency. We present phase diagrams for several types of lattices in the parameter plane of the rotation frequency and the ratio of inter-and intraspecies scattering lengths. The vortex structures are found to be diverse for the more miscible Dy-164-Dy-162 composition, with a variety of shapes, whereas for the less miscible case of Er-168-Dy-164, the lattice patterns mainly feature circular or square formats. (AU) | |
| FAPESP's process: | 14/01668-8 - Excitations of dipolar Bose-Einstein condensates |
| Grantee: | Kishor Kumar Ramavarmaraja |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |