Work

Vortex-peak interaction and lattice shape in rotating two-component Bose-Einstein condensates

Year: 2012

Type: article

Abstract: When a two-component Bose-Einstein condensate is placed into rotation, a lattice of vortices and cores appear. The geometry of this lattice (triangular or square) varies according to the rotational value and the intercomponent coupling strengths. In this paper, assuming a Thomas-Fermi regime, we derive a point energy that allows us to determine for which values of the parameters the lattice goes from triangular to square. It turns out that the separating curve in the phase diagram agrees fully with the complete numerical simulations of the Gross-Pitaevskii equations. We also derive a formula for the critical velocity of appearance of the first vortex and prove that the first vortex always appears first in the component with largest support in the case of two disks, and we give a criterion in the case of disk and annulus.

Source: Physical Review A

DOI: 10.1103/physreva.85.033614

Authors: Amandine Aftalion, Peter Mason, Juncheng Wei

Institutions: Centre National de la Recherche Scientifique, Université de Versailles Saint-Quentin-en-Yvelines, Laboratoire de Mathématiques de Versailles, Chinese University of Hong Kong

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2047860794

FWCI: 1.49

Cites: 15

Cited by: 38

Related to: 10