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Counterflow Quantum Turbulence and the Instability in Two-component Bose-Einstein Condensates

Counterflow Quantum Turbulence and the Instability in Two-component Bose-Einstein Condensates We theoretically study the nonlinear dynamics of the instability of counter-superflow in two miscible Bose-Einstein condensates. The condensates become unstable when the relative velocity exceeds a critical value, which is called counter-superflow instability. We reveal that the counter-superflow instability can lead to quantum turbulence by numerically solving the coupled Gross-Pitaevskii equations. The modes amplified by the instability grow into solitons and decay into quantized vortices. Eventually, the vortices become tangled and quantum turbulence of two superfluids. We show that this process may occur in experiments by investigating the dynamics in a 2D trapped system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Counterflow Quantum Turbulence and the Instability in Two-component Bose-Einstein Condensates

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References (14)

Publisher
Springer Journals
Copyright
Copyright © 2010 by Springer Science+Business Media, LLC
Subject
Physics; Magnetism, Magnetic Materials; Characterization and Evaluation of Materials; Condensed Matter Physics
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/s10909-010-0324-y
Publisher site
See Article on Publisher Site

Abstract

We theoretically study the nonlinear dynamics of the instability of counter-superflow in two miscible Bose-Einstein condensates. The condensates become unstable when the relative velocity exceeds a critical value, which is called counter-superflow instability. We reveal that the counter-superflow instability can lead to quantum turbulence by numerically solving the coupled Gross-Pitaevskii equations. The modes amplified by the instability grow into solitons and decay into quantized vortices. Eventually, the vortices become tangled and quantum turbulence of two superfluids. We show that this process may occur in experiments by investigating the dynamics in a 2D trapped system.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Dec 15, 2010

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