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

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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 0.2Tc 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.

Details

Original languageEnglish
Article number135302
Pages (from-to)1-4
JournalPhysical Review Letters
Volume107
Issue number13
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

    Research areas

  • quantized vortices, superfluid 3He, vortex front

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