On the Cauchy Problem for the Homogeneous Boltzmann-Nordheim Equation for Bosons: Local Existence, Uniqueness and Creation of Moments

International audienceThe Boltzmann-Nordheim equation is a modification of the Boltzmann equation, based on physical considerations, that describes the dynamics of the distribution of particles in a quantum gas composed of bosons or fermions. In this work we investigate the Cauchy theory of the spatially homogeneous Boltzmann-Nordheim equation for bosons, in dimension d 3. We show existence and uniqueness locally in time for any initial data in L ∞ (1 + |v| s) with finite mass and energy, for a suitable s, as well as the instantaneous creation of moments of all order