The growth resistance of 4He solid superfluid interfaces

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Abstract
The three available sets of data on the growth resistance of 4He solid-superfluid interface show that a unique process has to be invoked However, the available theories predict strong differences between hydrodynamic and ballistic regimes, and the accepted ideas on roton scattering lead to much lower values of the growth resistance. We solve these two paradoxes by remarking that the solid order must propagate in the liquid. The important features of the resulting scattering potential for rotons are first its long range and second that it cannot be reduced to a static one by any of the frame of reference