Gravitational four-fermion interaction and dynamics of the early Universe

A.S. Rudenko; I.B. Khriplovich

Gravitational four-fermion interaction and dynamics of the early Universe

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arxiv 1303.1348 v4 pith:44GVIV66 submitted 2013-03-06 astro-ph.CO gr-qc

I.B. Khriplovich , A.S. Rudenko This is my paper

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keywords interactionfour-fermiongravitationalenergy-momentumgffitensoranalyticalanalyze

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If torsion exists, it generates gravitational four-fermion interaction (GFFI), essential on the Planck scale. We analyze the influence of this interaction on the Friedmann-Lemaitre-Robertson-Walker (FLRW) 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 gravitational four-fermion interaction does not result in Big Bounce.

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Infrared foundations for quantum geometry II: Catalogue of all torsion-like theories including new ghost-tachyon-free cases
hep-th 2025-07 conditional novelty 7.0 of 10

A systematic catalogue of symmetric pair-antisymmetric rank-three field theories yields 22 ghost-tachyon-free models, all propagating vector torsion and none propagating scalar or pseudoscalar torsion.

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