Periodic Cosmological Evolutions of Equation of State for Dark EnergyReport as inadecuate




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1

Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan

2

Eurasian International Center for Theoretical Physics, Eurasian National University, Astana 010008, Kazakhstan

3

Department of Mathematics, Bengal Engineering and Science University, Shibpur, Howrah-711103, India





*

Author to whom correspondence should be addressed.



Abstract 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 ξt, σt 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. View Full-Text

Keywords: dark energy; cosmology; particle-theory and field-theory models of the early universe dark energy; cosmology; particle-theory and field-theory models of the early universe





Author: Kazuharu Bamba 1,2,* , Ujjal Debnath 3, Kuralay Yesmakhanova 2, Petr Tsyba 2, Gulgasyl Nugmanova 2 and Ratbay Myrzakulov 2

Source: http://mdpi.com/



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