Diffusion in two-component quasiparticle systems of solid 3He-4He mixtures

Starting from the system of kinetic equations for components of a two-component gas of quasiparticles with arbitrary dispersion law, the exact expression for the diffusion coefficient is obtained. This general results are used to study the phenomenon of quantum diffusion in solid 3He-4He. In particular, the width of the energy band of impuriton is calculated, and the physical reasons for a strong temperature dependence of the diffusion coefficient (D approx T-9) are explained