Distortion of Interference Fringes and the Resulting Vortex Production of Merging Bose-Einstein Condensates
arXiv:0912.5379 · doi:10.1103/PhysRevA.88.043602
Abstract
We investigate the effects of interatomic interactions and expansion on the distortion of interference fringes of a pair of initially well-separated, but coherent, condensate clouds trapped in a harmonic trap. The distortion of interference fringes, which can lead to the spontaneous formation of vortices in the atom clouds, depends crucially on two relevant parameters: the center-of-mass velocity and peak density of the initial state. We identify three qualitatively distinct regimes for the interfering condensates: collision, expansion, and merging, by the spatial and temporal features of the fringe spacings. Using a comprehensive set of numerical simulations based on the Gross-Pitaevskii equation, we specify the cross-overs between these regimes and propose the optimal the system parameters required for dynamical instabilities and vortex creation.
9 pages, 8 figures
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- Controlled engineering of a vortex-bright soliton dynamics using a constant driving force
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- Revealing turbulent Dark Matter via merging of self-Gravitating condensates
- Vortex interactions in the collision of Bose-Einstein condensates
- Dynamic instabilities and turbulence of merged rotating Bose-Einstein condensates
- Modeling atom interferometry experiments with Bose-Einstein condensates in power-law potentials
- Quantum reflection of a Bose-Einstein condensate from a rapidly varying potential: the role of dark soliton