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Related Experiment Video

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Scanning SQUID Study of Vortex Manipulation by Local Contact

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Published on: February 1, 2017

Quantum turbulence in a propagating superfluid vortex front.

V B Eltsov¹, A I Golov, R de Graaf

¹Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 5100, 02015 HUT, Finland.

Physical Review Letters

|February 1, 2008

Summary

This summary is machine-generated.

The study reveals how vortex fronts in superfluid 3He-B transition from laminar to quantum turbulence as temperature drops. Dissipation becomes independent of mutual friction and is suppressed at low temperatures.

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Area of Science:

Condensed Matter Physics
Quantum Fluids
Superfluidity

Background:

Superfluid 3He-B exhibits complex vortex dynamics.
Understanding turbulence in quantum systems is crucial.
Vortex fronts are key to studying transitions in superfluids.

Purpose of the Study:

To investigate the nature of vortex fronts in rotating superfluid 3He-B.
To characterize the transition from laminar to turbulent flow.
To measure dissipation rates in turbulent vortex dynamics.

Main Methods:

Experimental measurements of vortex front propagation.
Numerical simulations of superfluid hydrodynamics.
Theoretical analysis of vortex dynamics and turbulence.

Main Results:

Observed a transition from laminar to quasiclassical turbulent to quantum turbulent flow with decreasing temperature.
Provided the first direct measurement of dissipation rate in turbulent vortex dynamics of 3He-B.
Demonstrated mutual-friction independent dissipation at low temperatures, suppressed by Kelvin-wave cascades.

Conclusions:

The nature of vortex fronts is highly sensitive to temperature.
Dissipation mechanisms in quantum turbulence differ significantly from classical turbulence.
Kelvin-wave cascades play a critical role in energy transfer in superfluid turbulence.