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Class of Exact Solutions for a Cosmological Model of Unified Gravitational and Quintessence Fields
(Springer, 2017)
A new approach to tackle Einstein equations for an isotropic and homogeneous Friedmann-Robertson-Walker Universe in the presence of a quintessence scalar field is devised. It provides a way to get a simple exact solution ...
Quintessence as k-essence
(Elsevier Science, 2005-12)
Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree ...
Enlarged quintessence cosmology
(American Physical Society, 2000-08)
We show that the combination of a fluid with a bulk dissipative pressure and quintessence matter can simultaneously drive an accelerated expansion phase and solve the coincidence problem of our current Universe. We then ...
Interacting quintessence
(Elsevier Science, 2001-11)
We demonstrate that a suitable coupling between a quintessence scalar field and a pressureless cold dark matter (CDM) fluid leads to a constant ratio of the energy densities of both components which is compatible with an ...
Big brake singularity is accommodated as an exotic quintessence field
(American Physical Society, 2015-08)
We describe a big brake singularity in terms of a modified Chaplygin gas equation of state $p=(ga_{m}-1)ho+alga_{m}ho^{-n}$, accommodate this late-time event as an exotic quintessence model obtained from an energy-momentum ...
Comments on Unified dark energy and dark matter from a scalar field different from quintessence
(Bentham Science Publishers Ltd., 2011-10)
In a recent paper by C. Gao, M. Kunz, A. Liddle and D. Parkinson [1] the unification of dark matter and dark energy was explored within a theory, which they say is not of the Lagrangian type, containing a scalar field. ...
Class of Exact Solutions for a Cosmological Model of Unified Gravitational and Quintessence Fields.
A new approach to tackle Einstein equations for an isotropic and homogeneous Friedmann–Robertson–Walker Universe in the presence of a quintessence scalar field is devised. It provides a way to get a simple exact solution ...
Quintessece-like dark matter in spiral galaxies
(Revista Mexicana de Física, 2009)