Class of Exact Solutions for a Cosmological Model of Unified Gravitational and Quintessence Fields
Asenjo
F
A
author
Hojman
S
A
author
2017
English
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 to these equations. This solution determines the quintessence potential uniquely and it differs from solutions which have been used to study inflation previously. It relays on a unification of geometry and dark matter implemented through the definition of a functional relation between the scale factor of the Universe and the quintessence field. For a positive curvature Universe, this solution produces perpetual accelerated expansion rate of the Universe, while the Hubble parameter increases abruptly, attains a maximum value and decreases thereafter. The behavior of this cosmological solution is discussed and its main features are displayed. The formalism is extended to include matter and radiation.
Quintessence
Exact solution
Unification of geometry and dark matter
WOS:000404224500003
exported from refbase (show.php?record=741), last updated on Mon, 08 Jan 2018 18:09:32 -0300
text
files/741_Asenjo+Hojman2017.pdf
10.1007/s10701-017-0091-6
Asenjo+Hojman2017
Foundations Of Physics
Found. Phys.
2017
Springer
continuing
periodical
academic journal
47
7
887
896
0015-9018