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

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 ∝ k - 1 . In this work, we study numerically t...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2021-06, Vol.230 (4), p.809-812
Main Authors: Marino, Áttis V. M., Madeira, Lucas, Cidrim, André, dos Santos, F. E. A., Bagnato, Vanderlei S.
Format: Article
Language:English
Subjects:
Atomic
Bose-Einstein condensates
Classical and Continuum Physics
Computational fluid dynamics
Condensed Matter Physics
Decay
Energy spectra
Fluid flow
Fluxes
Incompressible flow
Kinetic energy
Materials Science
Measurement Science and Instrumentation
Molecular
Momentum
Non-Equilibrium Systems and Foundations of Quantum Physics
Optical and Plasma Physics
Physics
Physics and Astronomy
Regular Article
Turbulence
Vortices
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Summary: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 ∝ 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 ) ∝ 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.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjs/s11734-021-00083-3