4 papers
Torsional pseudo-inflation beyond Einstein-Cartan
Fernando Izaurieta, Samuel Lepe, Cristian Quinzacara
Torsion entered early-universe cosmology twice: through the nonsingular Einstein--Cartan bounce, where the quantum spin of fermions halts the contraction, and through the proposal…
How greedy is the Universe? An entropy ledger and a causal envelope for early black hole growth
Fernando Izaurieta, Cristian Quinzacara, Omar Valdivia
The entropy of the observable Universe is dominated, by fifteen orders of magnitude, by the horizons of supermassive black holes, and gravitational collapse into black holes has of…
No late-time role for adiabatic torsion: a no-go result for Hubble-cutoff holographic dark energy in Einstein--Cartan cosmology
Fernando Izaurieta, Samuel Lepe, Cristian Quinzacara
In Friedmann cosmology with Einstein--Cartan torsion, the homogeneous torsion mode compatible with a separately conserved matter sector scales as and enters the…
Geometric Action Principle for Unification Yang-Mills, Gravity and matter fermions
Pedro D. Alvarez, Fernando Izaurieta, Cristian Quinzacara
A single geometric invariant fixes the relative normalization and structure of gravity, Yang--Mills theory, and fermion kinetic terms. The restricted invariant basis contains known…