Bogoliubov-normal interaction and calculation of thermal conductivity of superfluid A_1 - ~3He

摘要

The diffusive thermal conductivity tensor of the A_1 -phase of superfluid ~He at low temperatures and melting pressure are calculated by s-p approximation, by using the Boltzmann equation approach. We obtain that the elements of the diffusive thermal conductivities, K_(xx), K_(yy), and K_(zz), are proportional to T~(-1). Then we compare the results of this paper and our results of thermal conductivity based on Pfitzner procedure. Temperature dependence of both results is equal but numerical coefficients of them are little different. Also we show that Boguliubov-normal interaction is important in comparison to other interactions.