Generation of vortices and observation of Quantum Turbulence in an oscillating Bose-Einstein Condensate
arXiv:0910.2729 · doi:10.1007/s10909-009-0045-2
Abstract
We report on the experimental observation of vortex formation and production of tangled vortex distribution in an atomic BEC of Rb-87 atoms submitted to an external oscillatory perturbation. The oscillatory perturbations start by exciting quadrupolar and scissors modes of the condensate. Then regular vortices are observed finally evolving to a vortex tangle configuration. The vortex tangle is a signature of the presence of a turbulent regime in the cloud. We also show that this turbulent cloud has suppression of the aspect ratio inversion typically observed in quantum degenerate bosonic gases during free expansion.
to appear in JLTP - QFS 2009
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- Quantum turbulence simulations using the Gross-Pitaevskii equation: high-performance computing and new numerical benchmarks
- Vortex reconnections in anisotropic trapped three-dimensional Bose-Einstein condensates
- Collective modes and generation of a new vortex in a trapped Bose gas at finite temperature
- Intra-scales energy transfer during the evolution of turbulence in a trapped Bose-Einstein condensate
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- Quantum turbulence in atomic Bose-Einstein condensates
- Entropy of a Turbulent Bose-Einstein Condensate
- Macroscopic excitations in confined Bose-Einstein condensates, searching for quantum turbulence
- Generalized Local Induction Equation, Elliptic Asymptotics, and Simulating Superfluid Turbulence