Isotropic vortex tangles in trapped atomic Bose-Einstein condensates via laser stirring
arXiv:1401.7257 · doi:10.1103/PhysRevA.89.025602
Abstract
The generation of isotropic vortex configurations in trapped atomic Bose-Einstein condensates offers a platform to elucidate quantum turbulence on mesoscopic scales. We demonstrate that a laser-induced obstacle moving in a figure-eight path within the condensate provides a simple and effective means to generate an isotropic three-dimensional vortex tangle due to its minimal net transfer of angular momentum to the condensate. Our characterisation of vortex structures and their isotropy is based on projected vortex lengths and velocity statistics obtained numerically via the Gross-Pitaevskii equation. Our methodology provides a possible experimental route for generating and characterising vortex tangles and quantum turbulence in atomic Bose-Einstein condensates.
5 pages, 4 figures
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- Vortex rings and vortex ring solitons in shaken Bose-Einstein condensate
- Statistical models of nonequilibrium Bose gases
- A quantum storm in a teacup