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f (R) Gravity Modifications: From The Action To The Data
(Springer, 2018-03-13)
It is a very well established matter nowadays that many modified gravity models can offer a sound alternative to General Relativity for the description of the accelerated expansion of the universe. But it is also equally ...
Cosmological constrains on fast transition Unified Dark Matter models
(IOP Publishing, 2015)
In this work we show the results obtained applying a Unified Dark Matter (UDM) model with a fast transition to a set of cosmological data. Two different functions to model the transition are tested, and the feasibility of ...
Observational constraints on the unified dark matter and dark energy model based on the quark bag model
(Elsevier, 2014-06-02)
In this work we investigate if a small fraction of quarks and gluons, which escaped hadronization and survived as a uniformly spread perfect fluid, can play the role of both dark matter and dark energy. This fluid, as ...
Anisotropic expansion and SNIa: An open issue
(Elsevier, 2015-02-04)
We review the appropriateness of using SNIa observations to detect potential signatures of anisotropic expansion in the Universe. We focus on Union2 and SNLS3 SNIa datasets and use the hemispherical comparison method to ...
Forecast And Analysis Of The Cosmological Redshift Drift
(Springer, 2018-01-08)
The cosmological redshift drift could lead to the next step in high-precision cosmic geometric observations, becoming a direct and irrefutable test for cosmic acceleration. In order to test the viability and possible ...
Ultra Light Axionic Dark Matter: Galactic Halos and Implications for Observations with Pulsar Timing Arrays
(MDPI, 2018-01-16)
The cold dark matter (CDM) paradigm successfully explains the cosmic structure over an enormous span of redshifts. However, it fails when probing the innermost regions of dark matter halos and the properties of the Milky ...
Characterization of (asymptotically) Kerr–de Sitter-like spacetimes at null infinity*
(IOP Publishing, 2016-08-04)
We investigate solutions(M, g) to Einstein's vacuum field equations with positive cosmological constant. which admit a smooth past null infinity J(-) a la Penrose and a Killing vector field whose associated Mars-Simon ...
Entanglement and extreme spin squeezing of unpolarized states
(IOP Publishing, 2017-01-20)
We present criteria to detect the depth of entanglement in macroscopic ensembles of spin-j particles using the variance and second moments of the collective spin components. The class of states detected goes beyond traditional ...
Implementation of the nursing process in a health area: models and assessment structures used
(Univ Sao Paulo, Escola de Enfermagem de Ribeirao Preto, 2014-09)
Objective: to analyze what nursing models and nursing assessment structures have been used in the implementation of the nursing process at the public and private centers in the health area Gipuzkoa (Basque Country). Method: ...
Anomalous transport in second order hydrodynamics
(E. D. P Sciences, 2016)
We study the non-dissipative transport effects appearing at second order in the hydrodynamic expansion for a non-interacting gas of chiral fermions by using the partition function formalism. We discuss some features of the ...