A new ripplon branch in He II

Details A new ripplon branch in He II A new ripplon branch in He II

2010-03-24

arxiv.org/abs/1003.4709v1

Low Temp. Phys., vol. 36, p. 582 (2010)

Physics

Condensed Matter

Other Condensed Matter

5 pages, 1 figure; full version to be published in Low Temperature Physics [Phys. Nizk. Temp.]

Scientific paper

10.1063/1.3479212

We analyse the dispersion relation of ripplons, on the surface of superfluid helium, using the dispersive hydrodynamics approach and find a new ripplon branch. We obtain analytical equation for the dispersion relation and analytic expressions for the limiting cases. We discuss where ripplons can exist in the energy-wavenumber plane. A numerical solution for the ripplon dispersion curve is obtained in the allowed regions. The new ripplon branch is found at energies just below the instability point.

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