Generation and characterization of quantum turbulence

Vanderlei Salvador Bagnato, E. A. L. Henn, Jorge Amin Seman +6 more

Tapio Simula

Carlos O. Font, David Bonanno, Hunter Long +2 more

Characterizing atmospheric turbulence through modeling dates back to the 1960's. For decades scientists have studied how to mitigate the effects of the atmospheric turbulence on communications and imaging systems, but learning how to use those properties of the atmosphere instead of mitigate them raise new challenges. Due to the fact that atmospheric turbulence is inherently a random process, it can be an ideal "key generator" for strongly secure information transfer. The purpose of this effort is to investigate to what extent the atmospheric turbulence can be exploited as a robust random number generator. In this paper we report the progress in characterizing the atmosphere and a random bitstream generator.

Brian P. Anderson, Tyler W. Neely, Ashton S. Bradley +7 more

We report the experimental generation of two-dimensional quantum turbulence in dilute-gas Bose-Einstein condensates by stirring the condensate with a laser beam, and the decay of the turbulent state to a large-scale flow in the form of a persistent current in a toroidal trap geometry. From numerical simulations of the stirring process, we characterize the dynamics of the quantized vortices in the condensate, and analyze the kinetic energy spectrum. Our observations are consistent with basic features of two-dimensional turbulence in classical incompressible fluids.

Carlo F. Barenghi, Ladislav Skrbek, Katepalli R. Sreenivasan

William Frank Vinen