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Extended tachyon field using form invariance symmetry
(American Physical Society, 2014-07)
In this work we illustrate how form-invariance transformations (FIT) can be used to construct phantom and complementary tachyon cosmologies from standard tachyon field universes. First we show how these transformations act ...
Tachyonization of the ΛCDM cosmological model
(Springer/Plenum Publishers, 2010-06)
In this work a tachyonization of the ΛCDM model for a spatially flat Friedmann-Robertson-Walker space-time is proposed. A tachyon field and a cosmological constant are considered as the sources of the gravitational field. ...
Phantom k-essence cosmologies
(American Physical Society, 2004-12)
We devise a method to obtain a phantom version of FRW k-essence cosmologies with homogeneous k fields by applying form-invariance transformations. It can be seen that the transformation performs the maps [Formula Presented] ...
Expansión acelerada del universo con Modelos Escalar-Tensoriales.
(2019-10-31)
La cosmología actual presenta dos retos muy importantes tanto para la física como para la ciencia moderna. Estos son el problema de la energía oscura que exige la existencia de un nuevo tipo de materia de presión negativa, ...
Randall-Sundrum brane cosmology: Modification of late-time cosmic dynamics by exotic matter
(2011)
In this paper we show, through the study of concrete examples, that depending on the cosmic dynamics of the energy density of matter degrees of freedom living in the brane, Randall-Sundrum (RS) brane effects can be important ...
Randomized study of danoprevir/ritonavir-based therapy for HCV genotype 1 patients with prior partial or null responses to peginterferon/ribavirin
(2011)
In this paper we show, through the study of concrete examples, that depending on the cosmic dynamics of the energy density of matter degrees of freedom living in the brane, Randall-Sundrum (RS) brane effects can be important ...