Parametric Generation of Second Sound by First Sound in Superfluid Helium
Condensed Matter
2016-08-31 v1 Pattern Formation and Solitons
patt-sol
Abstract
We report the first experimental observation of parametric generation of second sound (SS) by first sound (FS) in superfluid helium in a narrow temperature range in the vicinity of . The temperature dependence of the threshold FS amplitude is found to be in a good quantitative agreement with the theory suggested long time ago and corrected for a finite geometry. Strong amplitude fluctuations and two types of the SS spectra are observed above the bifurcation. The latter effect is quantitatively explained by the discreteness of the wave vector space and the strong temperature dependence of the SS dissipation length.
Keywords
Cite
@article{arxiv.cond-mat/9510111,
title = {Parametric Generation of Second Sound by First Sound in Superfluid Helium},
author = {Dmitry Rinberg and Vladimir Cherepanov and Victor Steinberg},
journal= {arXiv preprint arXiv:cond-mat/9510111},
year = {2016}
}
Comments
4 pages, 4 postscript figures, REVTEX