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

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Author(s):
Marino, Attis V. M. ; Madeira, Lucas ; Cidrim, Andre ; dos Santos, F. E. A. ; Bagnato, Vanderlei S.
Total Authors: 5
Document type: Journal article
Source: European Physical Journal-Special Topics; v. 230, n. 4, p. 4-pg., 2021-04-08.
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 proportional to 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) proportional to 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. (AU)

FAPESP's process: 17/09390-7 - Entanglement and blockade effects in ultracold atomic clouds
Grantee:André Cidrim Santos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/09191-7 - Vortices and turbulence in strongly interacting quantum fluids and their mixtures
Grantee:Lucas Madeira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/50857-8 - National Institute in Basic Optics and Applied to Life Sciences
Grantee:Vanderlei Salvador Bagnato
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/07276-1 - CEPOF - Optics and Photonic Research Center
Grantee:Vanderlei Salvador Bagnato
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC