Gravitational four-fermion interaction and dynamics of the early Universe
If torsion exists, it generates gravitational four-fermion interaction (GFFI), dominating on the Planck scale. We analyze the influence of this interaction on the Friedmann-Lemaitre-Robertson-Walker cosmology. Explicit analytical solution is derived for the problem where both the energy-momentum tensor generated by GFFI and the common ultrarelativistic energy-momentum tensor are included. We demonstrate that GFFI does not result in Big Bounce.