2 citations · 3 across the 8 of their papers we have counts for
10 papers
Torsion talks only to spin: the CMB temperature as a test of energy exchange in Einstein-Cartan cosmology
Fernando Izaurieta, Samuel Lepe, Cristian Quinzacara
The cosmic microwave background temperature at is known to from molecular absorption towards PKS~1830211; CO absorbers and Sunyaev-Zel'dovich clusters extend the…
Inhomogeneous dust collapse in five-dimensional AdS-Chern-Simons gravity
Luis Avilés, José Díaz, Cristian Quinzacara +1
We study the gravitational collapse of a spherically symmetric, inhomogeneous dust cloud in five-dimensional AdS Chern--Simons gravity. Working in the torsion-free sector and using…
Non-exotic traversable wormholes in Einstein-Chern-Simons gravity
Mauricio Cataldo, Fernando Goméz, Paola Meza +2
We investigate traversable wormhole solutions in five-dimensional Einstein-Chern-Simons (EChS) gravity, a gauge-theoretic extension of General Relativity that introduces a higher-c…
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 F…
A Geometric Action Principle for Unification of Yang-Mills Fields, Gravity and Matter Fermions
Pedro D. Alvarez, Fernando Izaurieta, Cristian Quinzacara
A single geometric action, constructed as a linear combination of a restricted six-dimensional family of Clifford-generated invariant terms, simultaneously generates the gravitatio…
Gravitational Faraday Effect induced by Dark Matter Spin
F. Barriga, F. Izaurieta, S. Lepe +4
We show that the spin of dark matter induces a gravitational analog of the electromagnetic Faraday effect, where the polarization of gravitational waves undergoes a rotation as the…
Electromagnetically and gravitationally stealth fields
Cristian Quinzacara, Paola Meza, Almeira Sampson +1
We construct a generic class of models for complex scalar fields -- minimally coupled to gravity and electromagnetism -- with the property that their energy-momentum tensor and the…
Massive stealth scalar fields from field redefinition method
Cristian C. Quinzacara, Paola Meza, Almeira Sampson +1
We propose an uni-parametric deformation method of action principles of scalar fields coupled to gravity which generates new models with massive stealth field configurations, i.e.…