Results 1 to 10 of about 178 (112)
Neutral Vortex Necklace in a Trapped Planar Superfluid [PDF]
Journal of Low Temperature Physics, 2021 We study quantum vortex states consisting of a ring of vortices with alternating sign, in a homogeneous superfluid confined to a circular domain. We find an exact stationary solution of the point vortex model for the neutral vortex necklace. We investigate the stability of the necklace state within both the point-vortex model and the Gross-Pitaevskii ...
Matthew Reeves, Ashton S Bradley
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Massive superfluid vortices and vortex necklaces on a planar annulus
SciPost Physics, 2023 We study a superfluid in a planar annulus hosting vortices with massive cores. An analytical point-vortex model shows that the massive vortices may perform radial oscillations on top of the usual uniform precession of their massless counterpart. Beyond a
Matteo Caldara, Andrea Richaud, Massimo Capone, Pietro Massignan
doaj +5 more sources
In-Plane Gradient Magnetic Field-Induced Topological Defects in Rotating Spin-1 Bose–Einstein Condensates with SU(3) Spin-Orbit Coupling [PDF]
EntropyWe study the topological defects and spin structures of rotating SU(3) spin–orbit-coupled spin F=1 Bose–Einstein condensates (BECs) in an in-plane quadrupole field with ferromagnetic spin interaction, and the BECs is confined by a harmonic trap.
Hui Yang, Peng-Yu Li, Bo Yu
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Generation of necklace-shaped high harmonics in a two-color vortex field
Optics Express, 2021 We numerically studied gas high-harmonic generation in a two-color vortex laser field using the non-adiabatic Lewenstein model. Macroscopic responses were calculated by numerically solving the three-dimensional propagation equation in cylindrical coordinates.
Shuangchen Ruan, Candong Liu
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Probing superfluidity with quantum vortex necklaces and Leggett's bounds
Physical Review ResearchWe theoretically investigate a binary Bose-Einstein condensate in which the majority component hosts a vortex necklace, whose vortex cores act as moving effective potential wells for the minority component.
Andrea Richaud, Pietro Massignan
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Physics of Fluids, 2012 Large eddy simulation (LES) is used to investigate the structure of the laminar horseshoe vortex (HV) system and the dynamics of the necklace vortices as they fold around the base of a circular cylinder mounted on the flat bed of an open channel for Reynolds numbers defined with the cylinder diameter, D, smaller than 4460. The study concentrates on the
George Constantinescu +2 more
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Unsteady Behavior of Necklace Vortex Produced by a Square Plate Protrusion
Open Journal of Fluid Dynamics, 2018 In this study, the unsteady behavior of necklace vortices formed in front of a square flat plate was experimentally investigated by flow visualization and PIV analysis by using a water channel. As a result, the necklace vortices started to oscillate when the Reynolds number increased beyond approximately 2000.
Hidemi Yamada
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Journal of Flow Control Measurement & Visualization, 2015 Various properties of a necklace vortex system formed around a rectangular plate standing vertically on a flat ground wall were investigated by visualizations produced by injecting fluorescent dye into a water channel flow. As a result, it was found that the necklace vortex pattern had three steady systems depending on the Reynolds number Reh, the ...
Hidemi Yamada
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Fusion of necklace-ring patterns into vortex and fundamental solitons in dissipative media
Optics Express, 2007 We demonstrate that necklace-shaped arrays of localized spatial beams can merge into stable fundamental or vortex solitons in a generic model of laser cavities, based on the two-dimensional complex Ginzburg-Landau equation with the cubic-quintic nonlinearity.
Boris Malomed, Y J He
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Formation of Necklace-Type Vortex System Upstream of a Gate Valve in Pipe Flow
Open Journal of Fluid Dynamics, 2018 A gate valve is one of the main elements of a circular pipeline, but the flow characteristics around the gate valve are hardly known. In this study, clarification of the flow field in front of the gate valve model in a pipe flow via flow visualization and PIV analysis was attempted.
Hidemi Yamada
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