Emergence of turbulence in an oscillating Bose-Einstein condensate

Autor:	Henn, E. A. L., Seman, J. A., Roati, G., Magalhaes, K. M. F., Bagnato, V. S.
Rok vydání:	2009
Předmět:	Condensed Matter - Quantum Gases Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. Lett. 103, 045301 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.103.045301
Popis:	We report on the experimental observation of vortices tangle in an atomic BEC of Rb-87 atoms when an external oscillatory perturbation is introduced in the trap. The vortices tangle configuration 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. Instead, the cloud expands keeping the ratio between their axis constant. Turbulence in atomic superfluids may constitute an alternative system to investigate decay mechanisms as well as to test fundamental theoretical aspects in this field. Comment: accepted for Phys. Rev. Lett
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0904.2564 Zobrazit plný text záznamu View this record from Arxiv