Anisotropic Energy Spectrum in Decaying Rotating Turbulence in the Gross–Pitaevskii Model
Yuto Sano, Makoto Tsubota
We investigate the dynamics of a decaying rotating turbulence using the dissipative Gross-Pitaevskii model.The turbulence is created by oscillating a Bose-Einstein condensate trapped in a cylindrical box potential.After the turbulence appears with the energy spectrum of a power law, we turn off the oscillation and rotate the condensate with an angular frequency Ω, thus realizing a decaying rotating turbulence.When Ω is low, the condensate shows a turbulent structure, and the power law behavior is modified by the rotation.For higher Ω, quantized vortices along the rotation axis are created.For much higher Ω, the stronger centrifugal force creates a 'giant vortex' that includes phase singularities in the central low-density hole, which yields an anisotropic energy spectrum.
International Conference on Low Temperature Physics (LT)•May 22, 2023•0 citations