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Author |
Asenjo, F.A.; Hojman, S.A. |
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Title |
Class of Exact Solutions for a Cosmological Model of Unified Gravitational and Quintessence Fields |
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Year |
2017 |
Publication |
Foundations Of Physics |
Abbreviated Journal |
Found. Phys. |
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Volume |
47 |
Issue |
7 |
Pages |
887-896 |
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Keywords |
Quintessence; Exact solution; Unification of geometry and dark matter |
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Abstract |
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. |
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Address |
[Asenjo, Felipe A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: felipe.asenjo@uai.cl; |
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Publisher |
Springer |
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Language |
English |
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ISSN |
0015-9018 |
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Notes |
WOS:000404224500003 |
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Call Number |
UAI @ eduardo.moreno @ |
Serial |
741 |
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