On the Possibility of "Dry" Friction in Superfluid He-4
Abstract
We propose a possible microscopic explanation of the exhaustion of s of helium-II on the wall at T>Tc = 0.5 - 1 K and predict a possibility of the existence in He-II of the "dry" friction at T < Tc. Both of the effects connect with that the energy of the 2D-rotons is 2K less then the energy of 3D-rotons, so the wall is a potential well for the last ones.
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