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

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2011
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-4
Series
PHYSICAL REVIEW LETTERS, Volume 107, issue 13
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.
Description
Keywords
quantized vortices, superfluid 3He, vortex front
Other note
Citation
Hosio, J J, Eltsov, V B, de Graaf, R, Heikkinen, P J, Hänninen, R, Krusius, M, "L'vov", V S & Volovik, G E 2011, ' Superfluid vortex front at T - > 0: decoupling from the reference frame ', Physical Review Letters, vol. 107, no. 13, 135302, pp. 1-4 . https://doi.org/10.1103/PhysRevLett.107.135302