Superfluid vortex front at T -> 0: Decoupling from the reference frame

Abstract

Steady-state turbulent motion is created in superfluid 3He-B at low temperatures in the form of a turbulent vortex front, which moves axially along a rotating cylindrical container of 3He-B and replaces vortex-free flow with vortex lines at constant density. We present the first measurements on the thermal signal from dissipation as a function of time, recorded at 0.2 Tc during the front motion, which is monitored using NMR techniques. Both the measurements and the numerical calculations of the vortex dynamics show that at low temperatures the density of the propagating vortices falls well below the equilibrium value, i.e. the superfluid rotates at a smaller angular velocity than the container. This is the first evidence for the decoupling of the superfluid from the container reference frame in the zero-temperature limit.

4 pages, 4 figures

References in corpus (4)

• Quantum turbulence in propagating superfluid vortex front
• Twisted vortex state
• Topological superfluid ${}^3$He-B: fermion zero modes on interfaces and in the vortex core
• Super Stability of Laminar Vortex Flow in Superfluid 3He-B

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• Quantum turbulence in superfluids with wall-clamped normal component
• Quasiparticle scattering measurements of laminar and turbulent vortex flow in the spin-down of superfluid 3He-B
• Turbulent Vortex Flow Responses at the AB Interface in Rotating Superfluid 3He-B
• Interpreting superfluid spin up through the response of the container
• Kelvin-Helmholtz instability of AB interface in superfluid 3He
• Emergent physics on Mach's principle and the rotating vacuum
• Dynamics of twisted vortex bundles and laminar propagation of the vortex front
• Andreev reflection in rotating superfluid ${}^3$He-B
• Thermal Detection of Turbulent and Laminar Dissipation in Vortex Front Motion