Energy spectra and fluxes of turbulent rotating Bose-Einstein condensates in two dimensions

• Verfasst von: Sivakumar, Anirudh [VerfasserIn]
• Verfasst von: Mishra, Pankaj Kumar [VerfasserIn]
• Verfasst von: Hujeirat, Ahmad [VerfasserIn]
• Verfasst von: Muruganandam, Paulsamy [VerfasserIn]
• Titel: Energy spectra and fluxes of turbulent rotating Bose-Einstein condensates in two dimensions
• Verf.angabe: Anirudh Sivakumar, Pankaj Kumar Mishra, Ahmad A. Hujeirat, Paulsamy Muruganandam
• E-Jahr: 2024
• Jahr: February 2024
• Fussnoten: Online verfügbar: 29. Februar 2024 ; Gesehen am 19.08.2024
• Titel Quelle: Enthalten in: Physics of fluids
• Ort Quelle: Melville, NY : AIP, 1958
• Jahr Quelle: 2024
• Band/Heft Quelle: 36(2024), 2 vom: Feb., Artikel-ID 027149
• ISSN Quelle: 0031-9171
• ISSN Quelle: 1070-6631
• DOI: doi:10.1063/5.0190917
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1899086048

Abstract

We investigate the scaling of the energy cascade in a harmonically trapped, turbulent, rotating Bose-Einstein condensate in two dimensions. We achieve turbulence by injecting a localized perturbation into the condensate and gradually increasing its rotation frequency from an initial value to a maximum. The main characteristics of the resulting turbulent state depend on the initial conditions, rotation frequency, and ramp-up time. We analyze the energy and the fluxes of kinetic energy by considering initial profiles without vortices and with vortex lattices. In the case without initial vortices, we find the presence of Kolmogorov-like scaling ( k − 5 / 3) of the incompressible kinetic energy in the inertial range. However, with initial vortex lattices, the energy spectrum follows Vinen scaling ( k − 1) at transient iterations. For cases with high rotating frequencies, Kolmogorov-like scaling emerges at longer durations. We observe positive kinetic energy fluxes with both initial states across all final frequencies, indicating a forward cascade of incompressible and compressible kinetic energy.