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arXiv · 1309.6218

Quantum turbulence by vortex stirring in a spinor Bose-Einstein condensate

B. Villaseñor·R. Zamora-Zamora·D. Bernal·V. Romero-Rochín
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Abstract

We introduce a novel mechanism to develop a turbulent flow in a spinor Bose-Einstein condensate, consisting in the stirring of a single line vortex by means of an external magnetic field. We find that density and velocity fluctuations have white-noise power spectra at large frequencies and that Kolmogorov 5/3 law is obeyed in the turbulent region. As the stirring is turned off, the flow decays to an agitated non-equilibrium state that shows an energy bottleneck crossover at small length scales. We demonstrate our findings by numerically solving two-state spinor coupled 3D Gross-Pitaevskii equations. We suggest that this mechanism may be experimentally implemented in spinor ultracold gases confined by optical traps.

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B. Villaseñor, R. Zamora-Zamora, D. Bernal, V. Romero-Rochín. 2013-09-24. Quantum turbulence by vortex stirring in a spinor Bose-Einstein condensate. https://doi.org/10.1103/physreva.89.033611

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