Momentum distribution of Vinen turbulence in trapped atomic Bose-Einstein condensates

Published on May 22, 2020in arXiv: Quantum Gases
· DOI :10.1140/EPJS/S11734-021-00083-3
Áttis V. M. Marino1
Estimated H-index: 1
 , Lucas Madeira7
Estimated H-index: 7
 (USP: University of São Paulo)+ 2 AuthorsVanderlei Salvador Bagnato64
Estimated H-index: 64
Sources
Abstract
The decay of multicharged vortices in trapped Bose-Einstein condensates may lead to a disordered vortex state consistent with the Vinen regime of turbulence, characterized by an absence of large-scale flow and an incompressible kinetic energy spectrum E\propto k^{-1} In this work, we study numerically the dynamics of a three-dimensional harmonically trapped Bose-Einstein condensate excited to a Vinen regime of turbulence through the decay of two doubly-charged vortices. First, we study the momentum distribution and observe the emergence of a power-law behavior n(k)\propto k^{-3}consistent with the coexistence of wave turbulence. We also study the kinetic energy and particle fluxes, which allows us to identify a direct particle cascade associated with the turbulent stage.
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