Periodic Cosmological Evolutions of Equation of State for Dark Energy
We demonstrate two periodic or quasi-periodic generalizations of the Chaplygin gas (CG) type models to explain the origins of dark energy as well as dark matter by using the Weierstrass ξ(t), σ(t) and ζ (t) functions with two periods being infinite. If the universe can evolve periodically, a non-sin...
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| Format: | Article |
| Language: | English |
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MDPI AG
2012-11-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/14/11/2351 |
| _version_ | 1811185171963052032 |
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| author | Ratbay Myrzakulov Gulgasyl Nugmanova Petr Tsyba Kuralay Yesmakhanova Kazuharu Bamba Ujjal Debnath |
| author_facet | Ratbay Myrzakulov Gulgasyl Nugmanova Petr Tsyba Kuralay Yesmakhanova Kazuharu Bamba Ujjal Debnath |
| author_sort | Ratbay Myrzakulov |
| collection | DOAJ |
| description | We demonstrate two periodic or quasi-periodic generalizations of the Chaplygin gas (CG) type models to explain the origins of dark energy as well as dark matter by using the Weierstrass ξ(t), σ(t) and ζ (t) functions with two periods being infinite. If the universe can evolve periodically, a non-singular universe can be realized. Furthermore, we examine the cosmological evolution and nature of the equation of state (EoS) of dark energy in the Friedmann–Lemaître–Robertson–Walker cosmology. It is explicitly illustrated that there exist three type models in which the universe always stays in the non-phantom (quintessence) phase, whereas it always evolves in the phantom phase, or the crossing of the phantom divide can be realized. The scalar fields and the corresponding potentials are also analyzed for different types of models. |
| first_indexed | 2024-04-11T13:25:59Z |
| format | Article |
| id | doaj.art-b1b5c89bfe5d4e6881e961e315216bc7 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T13:25:59Z |
| publishDate | 2012-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-b1b5c89bfe5d4e6881e961e315216bc72022-12-22T04:22:05ZengMDPI AGEntropy1099-43002012-11-0114112351237410.3390/e14112351Periodic Cosmological Evolutions of Equation of State for Dark EnergyRatbay MyrzakulovGulgasyl NugmanovaPetr TsybaKuralay YesmakhanovaKazuharu BambaUjjal DebnathWe demonstrate two periodic or quasi-periodic generalizations of the Chaplygin gas (CG) type models to explain the origins of dark energy as well as dark matter by using the Weierstrass ξ(t), σ(t) and ζ (t) functions with two periods being infinite. If the universe can evolve periodically, a non-singular universe can be realized. Furthermore, we examine the cosmological evolution and nature of the equation of state (EoS) of dark energy in the Friedmann–Lemaître–Robertson–Walker cosmology. It is explicitly illustrated that there exist three type models in which the universe always stays in the non-phantom (quintessence) phase, whereas it always evolves in the phantom phase, or the crossing of the phantom divide can be realized. The scalar fields and the corresponding potentials are also analyzed for different types of models.http://www.mdpi.com/1099-4300/14/11/2351dark energycosmologyparticle-theory and field-theory models of the early universe |
| spellingShingle | Ratbay Myrzakulov Gulgasyl Nugmanova Petr Tsyba Kuralay Yesmakhanova Kazuharu Bamba Ujjal Debnath Periodic Cosmological Evolutions of Equation of State for Dark Energy Entropy dark energy cosmology particle-theory and field-theory models of the early universe |
| title | Periodic Cosmological Evolutions of Equation of State for Dark Energy |
| title_full | Periodic Cosmological Evolutions of Equation of State for Dark Energy |
| title_fullStr | Periodic Cosmological Evolutions of Equation of State for Dark Energy |
| title_full_unstemmed | Periodic Cosmological Evolutions of Equation of State for Dark Energy |
| title_short | Periodic Cosmological Evolutions of Equation of State for Dark Energy |
| title_sort | periodic cosmological evolutions of equation of state for dark energy |
| topic | dark energy cosmology particle-theory and field-theory models of the early universe |
| url | http://www.mdpi.com/1099-4300/14/11/2351 |
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