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Lookup NU author(s): Dr Srivatsa BadariprasadORCiD, Professor Nick ParkerORCiD, Dr Andrew BaggaleyORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
The static and dynamic properties of vortices in dipolar Bose-Einstein condensates (dBECs) can be considerably modified relative to their nondipolar counterparts by the anisotropic and long-ranged nature of the dipole-dipole interaction. Working in a uniform dBEC, we analyze the structure of single vortices and the dynamics of vortex pairs, investigating the deviations from the nondipolar paradigm. For a straight vortex line, we find that the induced dipolar interaction potential is axially anisotropic when the dipole moments have a nonzero projection orthogonal to the vortex line. This results in a corresponding elongation of the vortex core along this projection as well as an anisotropic superfluid phase and enhanced compressibility in the vicinity of the vortex core. Consequently, the trajectories of like-signed vortex pairs are described by a family of elliptical and oval-like curves rather than the familiar circular orbits. Similarly for opposite-signed vortex pairs their translation speeds along the binormal are found to be dipole-interaction dependent. We expect that these findings will shed light on the underlying mechanisms of many-vortex phenomena in dBECs such as quantum turbulence, vortex reconnections, and vortex lattices.
Author(s): Prasad SB, Parker NG, Baggaley AW
Publication type: Article
Publication status: Published
Journal: Physical Review A
Year: 2024
Volume: 109
Issue: 6
Print publication date: 17/06/2024
Online publication date: 17/06/2024
Acceptance date: 25/04/2024
Date deposited: 17/06/2024
ISSN (print): 2469-9926
ISSN (electronic): 2469-9934
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevA.109.063323
DOI: 10.1103/PhysRevA.109.063323
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