Generation of Vortices and Observation of Quantum Turbulence in an Oscillating Bose-Einstein Condensate
Year: 2010
Authors: Henn E.A.L., Seman J.A., Roati G., Magalhaes K.M.F., Bagnato V.S.
Autors Affiliation: Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil; Univ Florence, LENS, I-50019 Sesto Fiorentino, Italy; Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy; CNR, INFM, I-50019 Sesto Fiorentino, Italy.
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.
Journal/Review: JOURNAL OF LOW TEMPERATURE PHYSICS
Volume: 158 (3-4) Pages from: 435 to: 442
More Information: We acknowledge financial support from FAPESP (CEPID program), CNPq (INCT program) and CAPES.KeyWords: Vortices; Quantum turbulence; Bose-Einstein condensationDOI: 10.1007/s10909-009-0045-2Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)