Quantum turbulence by vortex stirring in a spinor Bose-Einstein condensate
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.
Keywords
Cite
@article{arxiv.1309.6218,
title = {Quantum turbulence by vortex stirring in a spinor Bose-Einstein condensate},
author = {B. Villaseñor and R. Zamora-Zamora and D. Bernal and V. Romero-Rochín},
journal= {arXiv preprint arXiv:1309.6218},
year = {2015}
}
Comments
14 pages, 6 figures, 3 videos with URL provided