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Latin America Optics and Photonics Conference

Quantum Turbulence in a Sample of Trapped Cold Gas

Vanderlei Salvador Bagnato

Published Jan 1, 2014• 0 citations
Publisher

Abstract

Using a Bose-Einstein condnesate of Rb atoms, we have demonstrated properties related to a tangle configuration of vortices, The main properties like hydrodynamics, energy spectrum, and many others are investigated. Future perspectives are discusssed. Article not available.
DOI
10.1364/laop.2014.lth1a.1

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Cover Picture: Laser Phys. Lett. 5/2011

Color snapshot of a trapped 87Rb Bose-Einstein turbulent condensate containing about 105 atoms. The cloud contains a number of quantized vortices spread all over the atomic sample, arranged in an irregular tangled configuration reminding Swiss cheese. The turbulent vortex configuration, observed in a trapped superfluid, presents new perspectives for investigating quantum turbulence phenomena in finite systems. (Cover picture: R.F. Shiozaki, G.D. Telles, et al., pp. 393–397, in this issue) (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)

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Quantum turbulence is recently one of the most important topics in low temperature physics. Physics of quantum turbulence and quantized vortices have been studied chiefly in superfluid helium. The realization of atomic Bose-Einstein condensation has allowed us to study quantized vortives in the fascinating systems too. Generally there are two kinds of cooperative phenomena comprised of quantized vortices, from the research history of superfluid helium. Lots of studies in atomic Bose-Einstein condensates (BECs) are devoted mainly to the issues of vortex lattices under rotation. However, another important state on quantized vortices, namely quantum turbulence, has been never studied in atomic BECs. In this work, we address for the first time quantum turbulence in atomic BECs theoretically and numerically. After reviewing shortly the recent developments on quantum turbulecne, we propose how to make quantum turbulence in a trapped BEC by combining rotation around two axes, and confirm the Kolmogorov spectra by the Gross-Pitaevskii model.
Color snapshot of a trapped 87Rb Bose-Einstein turbulent condensate containing about 105 atoms. The cloud contains a number of quantized vortices spread all over the atomic sample, arranged in an irregular tangled configuration reminding Swiss cheese. The turbulent vortex configuration, observed in a trapped superfluid, presents new perspectives for investigating quantum turbulence phenomena in finite systems. (Cover picture: R.F. Shiozaki, G.D. Telles, et al., pp. 393–397, in this issue) (© 2011 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)