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Kourosh Nozari

Kourosh Nozari

Academic rank: Professor
ORCID: https://orcid.org/0000-0003-4368-5823
Education: PhD.
ScopusId: 9276301800
Faculty: Science
Address: Department of Theoretical Physics, Faculty of Basic Sciences, University of Mazandaran, P. O. Box 47416-95447, Babolsar, Iran
Phone: 01135302482

Research

Title
Dynamical-screening and the phantom-like effects in a DGP-inspired<i>F</i>(<i>R</i>, ϕ) model
Type
JournalPaper
Keywords
modified gravity, cosmological applications of theories with extra dimensions, dark energy theory
Year
2009
Journal Journal of Cosmology and Astroparticle Physics
DOI
Researchers Kourosh Nozari ، Faezeh Kiani

Abstract

Based on the Lue-Starkman conjecture on the dynamical screening of the brane cosmological constant in the DGP scenario, we extend this proposal to a general DGPinspired F(R, φ) Model. We show that modification of the induced gravity and its coupling to a quintessence field localized on the brane, affects the screening of the brane cosmological constant and also phantom-like behavior on the brane. We extend our study to possible modification of the induced gravity on the brane and for clarification some specific examples are presented. As a result, phantom-like behavior can be realized in this setup without violating the null energy condition at least in some subspaces of the model parameter space. The key result of our study is the fact that a DGP-inspired F(R, φ) scenario has the best fit with LCDM and recent observations than other alternative theories.