Big bounce from gravitational four-fermion interaction [PDF]
I. B. KhriplovichThe four-fermion gravitational interaction is induced by torsion, and gets dominating on the Planck scale. The regular, axial-axial part of this interaction by itself does not stop the gravitational compression. However, the anomalous, vector-vector interaction results in a natural way in big bounce.View original: http://arxiv.org/abs/1203.5875
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