Experiments on the twisted vortex state in superfluid 3He-B

Details Experiments on the twisted vortex state in superfluid 3He-B Experiments on the twisted vortex state in superfluid 3He-B

2007-06-14

arxiv.org/abs/0706.2080v1

J. Low Temp. Phys. 150, 373 (2008)

Physics

Condensed Matter

Soft Condensed Matter

prepared for proceedings of the QFS2007 symposium in Kazan

Scientific paper

10.1007/s10909-007-9565-9

We have performed measurements and numerical simulations on a bundle of vortex lines which is expanding along a rotating column of initially vortex-free 3He-B. Expanding vortices form a propagating front: Within the front the superfluid is involved in rotation and behind the front the twisted vortex state forms, which eventually relaxes to the equilibrium vortex state. We have measured the magnitude of the twist and its relaxation rate as function of temperature above 0.3Tc. We also demonstrate that the integrity of the propagating vortex front results from axial superfluid flow, induced by the twist.

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