Cosmological implications of vacuum energy in Rastall theory

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Ghaffari Shayesteh

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: JOURNAL OF RESEARCH ON MANY BODY SYSTEMS Year:2020 | Volume:10 | Issue:3 Page(s): 61-75

Download Full-Text

Persian Verion

View:

515

Download:

Cites:

Information Journal Paper

Title

Cosmological implications of vacuum energy in Rastall theory

Author(s)

Ghaffari Shayesteh | Issue Writer Certificate

Keywords

Holographic dark energyQ1

Accelerated UniverseQ1

Rastall theoryQ1

Abstract

In this paper, we study the cosmic evolution of the Holographic dark energy (HDE) model with the Hubble radius as the IR cut-off in the Rastall theory and study its dynamical behavior by two different approaches. In the first approach, we consider the vacuum energy as a candidate for dark energy, HDE, by using Cohen formulation. In the second approach we assume DE as a combination of the Rastall term and vacuum energy. We calculate the cosmological parameters, such as: equation of state, deceleration and the dimensionless density parameters of the models in both non-interacting and interacting cases for both approaches. Our studies show that, in the first approach, HDE model in Rastall gravity can explain the current Accelerated Universe even without considering interaction between two dark sectors. But the dimensionless density parameter model becomes a constant. Therefore, we introduce the second approach that its dimensionless density parameter is dynamic and its evolution behavior is in agreement with the recent observational data. We have also found that in this model the Universe has a transition from the decelerated phase to accelerated phase at the redshift 0. 6 z  which is in the agreement with the cosmological observation. Also, we investigate the classical stability of the model and find that the model in the second approach can be stable for some values of parameters which is unlike the first approach.

Cites

No record.

References

No record.

Cite

APA: Copy

Ghaffari, Shayesteh. (2020). Cosmological implications of vacuum energy in Rastall theory. JOURNAL OF RESEARCH ON MANY BODY SYSTEMS, 10(3 ), 61-75. SID. https://sid.ir/paper/399724/en

Vancouver: Copy

Ghaffari Shayesteh. Cosmological implications of vacuum energy in Rastall theory. JOURNAL OF RESEARCH ON MANY BODY SYSTEMS[Internet]. 2020;10(3 ):61-75. Available from: https://sid.ir/paper/399724/en

IEEE: Copy

Shayesteh Ghaffari, “Cosmological implications of vacuum energy in Rastall theory,” JOURNAL OF RESEARCH ON MANY BODY SYSTEMS, vol. 10, no. 3 , pp. 61–75, 2020, [Online]. Available: https://sid.ir/paper/399724/en

Related Journal Papers