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Holographic cosmology solutions of problems with pre-inflationary cosmology
(2020-12-01)
In this paper we describe in detail how to solve the problems of pre-inflationary cosmology within the holographic cosmology model of McFadden and Skenderis [1]. The solutions of the smoothness and horizon problems, the ...
Exact solutions to Elko spinors in spatially flat Friedmann-Robertson-Walker spacetimes
(Iop Publishing Ltd, 2014-03-01)
In this paper we present exact solutions to the so-called Elko spinors for three models of expanding universe, namely the de Sitter, linear and the radiation type evolution. The study was restricted to flat, homogeneous ...
Some remarks on the attractor behaviour in ELKO cosmology
(Iop Publishing Ltd, 2014-08-01)
Recent results on the dynamical stability of a system involving the interaction of the ELKO spinor field with standard matter in the universe have been reanalysed, and the conclusion is that such system does not exhibit ...
Reheating in holographic cosmology and connecting to Λ-MSSM constructions for particle physics
(2021-09-01)
In this paper we model the transition from the non-geometric holographic cosmology regime, to the usual radiation dominated (RD) cosmology, known as reheating in the case of (perturbative) inflation. We find that we can ...
Λ(t) cosmology induced by a slowly varying Elko field
(2017-01-27)
In this work the exact Friedmann-Robertson-Walker equations for an Elko spinor field coupled to gravity in an Einstein-Cartan framework are presented. The torsion functions coupling the Elko field spin-connection to gravity ...
Holographic cosmology from “dimensional reduction” of N = 4 SYM vs. AdS5 × S 5
(2019-12-01)
We propose a way to obtain holographic cosmology models for 3+1 dimensional cosmologies vs. 3 dimensional field theories from a “dimensional reduction” procedure, obtained by integrating over the time direction, of (modifed) ...
Effective lagrangian for a mass dimension one fermionic field in curved spacetime
(2018-02-01)
In this work we use momentum-space techniques to evaluate the propagator G(x, x′) for a spin 1/2 mass dimension one spinor field on a curved Friedmann-Robertson-Walker spacetime. As a consequence, we built the one-loop ...
Effective lagrangian for a mass dimension one fermionic field in curved spacetime
(Springer, 2018)
In this work we use momentum-space techniques to evaluate the propagator G(x
Quantum gravity and the holographic dark energy cosmology
(2016-04-01)
The holographic dark energy model is obtained from a cosmological constant generated by generic quantum gravity effects giving a minimum length. By contrast, the usual bound for the energy density to be limited by the ...
From inflation to recent cosmic acceleration: The fermionic Elko field driving the evolution of the universe
(2017-09-27)
In this paper we construct the complete evolution of the universe driven by the mass dimension one dark spinor called Elko, starting with inflation, passing by the matter dominated era and finishing with the recent accelerated ...