Single-Vortex Nucleation in Rotating Superfluid 3 He-B
- 10 September 1995
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 31 (8) , 449-454
- https://doi.org/10.1209/0295-5075/31/8/005
Abstract
Nucleation of vortices in units of one quantum has been observed with c.w. NMR in a rotating cylinder filled with 3He-B. During acceleration a new vortex is created each time the counterflow velocity at the perimeter reaches a critical value vc(T, p). The measured vc resembles the calculated velocity vcb(T, p) of the bulk superflow instability, but is smaller by a factor with power law dependence on the superfluid coherence length. This indicates that a nucleation event takes place whenever the flow exceeds vcb locally at the nucleation site and the nucleation barrier vanishes.Keywords
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