Phenomenological models of Universe with varying G and Λ

• Authors: Martiros Khurshudyan
• Languages of publication: EN

Abstracts

EN

In this article we will consider several phenomenological models for the Universe with varying G and Λ(t), where G is the gravitational ”constant” and Λ(t) is a varying cosmological ”constant”. Two-component fluid model are taken into account. An interaction of the phenomenological form between a barotropic fluid and a quintessence DE is supposed. Three different forms of Λ(t) will be considered. The problem is analysed numerically and behavior of different cosmological parameters investigated graphically. Conclusion and discussions are given at the end of the work. In an Appendix information concerning to the other cosmological parameters is presented.

Keywords

EN

accelerated expansion; quintessence DE; modified gravity

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2014
• Volume: 12
• Issue: 5
• Pages: 348-366

Dates

published

1 - 5 - 2014

online

8 - 5 - 2014

Contributors

author

Martiros Khurshudyan

• Department of Theoretical Physics, Yerevan State University, 1 Alex Manookian, 0025, Yerevan, Armenia

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Identifiers

DOI

10.2478/s11534-014-0453-z