Strong quantum turbulence in Bose-Einstein condensates
H. A. J. Middleton-Spencer, Arnol D. García-Orozco, Luca Galantucci, Michelle A. Moreno-Armijos, N. G. Parker, L. A. Machado, V. S. Bagnato, C. F. Barenghi
Abstract
By combining experiments and numerical simulations which model the dynamics of shaken atomic Bose-Einstein condensates, we reveal the surprising nature of quantum turbulence in these systems. Unlike the tangles of vortex lines described in the superfluid helium literature, we find that our turbulent atomic condensate contains a mixture of strong fragmented density fluctuations and small random vortex loops which are not homogeneously distributed. This unusual form of turbulence, with its own properties and scaling behavior, which we call strong quantum turbulence, is significantly different from the turbulence which is observed in either classical or other quantum systems, thus posing a new challenge in turbulence research.