Kinetics of the Bose–Einstein condensation

We study the bosonic Boltzmann–Nordheim kinetic equation, which describes the kinetic regime of weakly interacting bosons with ss-wave scattering only. We consider a spatially homogeneous fluid with an isotropic momentum distribution. The issue of the dynamical formation of a Bose–Einstein condensate has been studied extensively. We supply here the completed equations of motion for the coupled system, the energy density distribution of the normal fluid and the density of the condensate. With this information the post-nucleation self-similar solution is investigated in more detail than before.