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Title: Fluctuative mechanism of vortex nucleation in the flow of 4He
Authors: Kusmartsev, F.V.
Issue Date: 1996
Abstract: We propose a mechanism of a vortex nucleation in a flow of a superfluid $^4He$. The mechanism is related to the creation by critical fluctuations of a "plasma" of half-vortex rings located near the wall. The "plasma" screens the attraction of the vortex to the wall and permits vortex nucleation. In the spirit of Williams-Shenoy theory we derive the scaling laws in the critical region and estimate the scaling relation and the critical exponent $p$ for critical velocity; we find $V_c\sim V_{0}(1-T/T_c)$, so that $p=1$. Various applications of the obtained results are discussed.
Description: This is a pre-print. It is lso available at: http://arxiv.org/abs/cond-mat/9601143. The definitive version: KUSMARTSEV, F.V., 1996. Fluctuative Mechanism of Vortex Nucleation in the Flow of $^4He$. Physics Review Letters, 76(13), is available at: http://prl.aps.org/.
URI: https://dspace.lboro.ac.uk/2134/1229
Appears in Collections:Pre-Prints (Physics)

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