The dynamics of quantized vortices in rotating 3He-B is investigated in the low density (single-vortex) regime as a function of temperature. An abrupt transition is observed at 0.5Tc. Above this temperature the number of vortex lines remains constant, as they evolve to their equilibrium positions. Below this temperature the number of vortices increases linearly in time until the vortex density has grown sufficiently for turbulence to switch on. On the basis of numerical calculations we suggest a mechanism responsible for vortex formation at low temperatures and identify the mutual friction parameter which governs its abrupt temperature dependence.
@article{arxiv.cond-mat/0502119,
title = {Vortex Multiplication in Applied Flow: the Precursor to Superfluid Turbulence},
author = {A. P. Finne and V. B. Eltsov and G. Eska and R. Hanninen and J. Kopu and M. Krusius and E. V. Thuneberg and M. Tsubota},
journal= {arXiv preprint arXiv:cond-mat/0502119},
year = {2007}
}
Comments
5 pages, 4 figures; version submitted to Phys. Rev. Lett