[PDF] Top 20 Vortex nucleation in superfluid He 4
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Vortex nucleation in superfluid He 4
... Unlike the other speakers at the meeting, I have never collaborated formally with Joe, or co-authored a paper with him, and to that extent I am an imposter. Nonetheless, as I shall seek to show, we have shared many ... See full document
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Superfluid helium-4 hydrodynamics with discrete topological defects
... In superfluid helium-4, the order parameter depicts the material flow of an inviscid fluid, and its topological defects correspond to line vortices in this ... See full document
20
Interactions between normal-fluid and superfluid vortex rings in helium-4
... normal-fluid vortex rings on superfluid ones is an energy transfer that blows-up the latter to the size of the ...the superfluid that correspond to those in the normal-fluid ought to ...coherent ... See full document
6
Mutual-friction induced instability of normal-fluid vortex tubes in superfluid helium-4
... the superfluid-vorticity propagating front of ...spiral vortex-line structures, or regions of high vortex-line twist/curvature ...also vortex- line direction reversals within the tube-core, ... See full document
14
Probing superfluid 4He with high frequency nanomechanical resonators down to mK temperatures
... predicting a quadratic dependence on the frequency of the nanobeam oscillating in fluid. The inset in Fig. 2(a) shows the measured losses of the nanobeams in superfluid helium as a function of their resonance ... See full document
5
Optomechanics with Superfluid Helium 4
... In the first design, assuming the indium seals did not add height to the valve, the needle traveled about 0.050” to make contact with the seal. Given the bellows spring rate of 40.33 lb/in., this distance required about ... See full document
231
Decay of finite temperature superfluid helium-4 turbulence
... the superfluid momentum (phase-field ...BEC He is special, since the Goldstone mode is an inviscid fluid, distinct from the normal-fluid of Bogolyubov’s quasi-particle excitations of the ground ...the ... See full document
13
Generation of defects in superfluid He 4 as an analogue of the formation of cosmic strings
... As the system passes through the phase transition, an event horizon limits the size of causally connected regions of the nascent new phase (superfluid/true vacuum), giving rise to topological defects where the ... See full document
9
Energy spectra of finite temperature superfluid helium-4 turbulence
... temperature superfluid helium-4 based on coupled Langevin-Navier-Stokes dynamics is ...temperature superfluid turbulence is ...and superfluid turbulence is significantly more complex than that ... See full document
15
Probing Bogoliubov Quasiparticles in Superfluid $$^3$$ 3 He with a ‘Vibrating Wire Like’ MEMS Device
... Surprisingly, in 3 He the resonance lineshape was nonlinear even for rather low velocities (corresponding to small maximum displacements) (see Fig. 4). Nonlin- earity makes the measurements tedious: ... See full document
8
Kinetic energy of He atoms in liquid He-4-He-3 mixtures
... distributions n( p), and the single-atom mean kinetic energy 具 T 典 of the two isotopes. In recent years, considerable efforts have been addressed to the understanding of microscopic static and dynamical properties in ... See full document
7
Effective three-body interactions via photon-assisted tunneling in an optical lattice
... Over the last decade, experiments with ultracold atomic gases in optical lattices have advanced to the point that many-body models can be engineered mi- croscopically [1, 2]. These developments have opened numerous ... See full document
12
Vortex nucleation in bose-einstein condensates due to effective magnetic fields
... of superfluid systems is their abil- ity to support quantized vortices ...rotating superfluid, when studied in the rotating frame, mimic those of a charged superfluid 共a superconductor兲 in a magnetic ... See full document
5
Transition from Ekman flow to Taylor vortex flow in superfluid helium
... figure 4 we investigate the transition from Ekman flow to Taylor vortex flow at T = ...Taylor vortex flow is fully developed and we can see that despite the superfluid having an additional weak pair of ... See full document
13
Acoustic Damping of Quartz Tuning Forks in Normal and Superfluid $^3$He
... At 450 mK the normal fluid component density of 4 He- II is negligible and we expect the data measured at these temperatures to be consistent with the ballistic frame- work. Hence the low frequency damping ... See full document
9
Quantum turbulence in 4He, oscillating grids, and where do we go next?
... viscosity; He II, on the other hand, possesses superfluid properties such as zero viscosity allowing frictionless flow, quan- tization of circulation ...creeping superfluid film. In fact, He ... See full document
19
Vortex structure in superfluid color-flavor locked quark matter
... high vortex (winding) number, and since our Ansatz is not the lowest energy state, it has a lot of excess ...Figure 4(a), despite the large time separation of the ... See full document
8
Expansion of liquid He 4 through the lambda transition
... superfluid transition. Preliminary experiments (Hendry et al, Nature 368 , 315; 1994) seemed to support this idea in that the quenches produced the pre- dicted high vortex-densities. The present paper ... See full document
21
The effect of strong electric fields on exotic negative ions in He II : possible evidence for the nucleation of charged vortex rings
... Fig. 4, each appear to tend towards a (different) field-independent limiting value of several m/s in very high electric ...charged vortex rings, as we believe to be the case, then it seems extremely likely ... See full document
7
Microscopic mechanism and kinetics of ice formation at complex interfaces : zooming in on kaolinite
... T he formation of ice is at the heart of intracellular freezing, 1 stratospheric ozone chemistry, 2 cloud dynamics, 3 rock weathering, 4 and hydrate ...ice nucleation within pure supercooled liquid ... See full document
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