Generation of Vortices and Observation of Quantum Turbulence in an Oscillating Bose-Einstein Condensate
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2010
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Resumo |
We report on the experimental observation of vortex formation and production of tangled vortex distribution in an atomic BEC of (87)Rb 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. FAPESP Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CNPq Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) CAPES Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) |
Identificador |
JOURNAL OF LOW TEMPERATURE PHYSICS, v.158, n.3/Abr, p.435-442, 2010 0022-2291 http://producao.usp.br/handle/BDPI/29634 10.1007/s10909-009-0045-2 |
Idioma(s) |
eng |
Publicador |
SPRINGER/PLENUM PUBLISHERS |
Relação |
Journal of Low Temperature Physics |
Direitos |
restrictedAccess Copyright SPRINGER/PLENUM PUBLISHERS |
Palavras-Chave | #Vortices #Quantum turbulence #Bose-Einstein condensation #KELVIN-HELMHOLTZ INSTABILITY #HELIUM #LIQUID #Physics, Applied #Physics, Condensed Matter |
Tipo |
article original article publishedVersion |