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Tahereh Azizi

Tahereh Azizi

Academic rank: Assistant Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 35302480

Research

Title
Phantom-like behavior in f (R)-gravity
Type
JournalPaper
Keywords
Modified Gravity Dark energy
Year
2009
Journal Physics Letters B
DOI
Researchers Kourosh Nozari ، Tahereh Azizi

Abstract

We investigate possible realization of the phantom-like behavior in the framework of f (R)-gravity models where there are no phantom fields in the matter sector of the theory. By adopting some observationally reliable ansatz for f (R), we show that it is possible to realize phantom-like behavior in f (R)-gravity without introduction of phantom fields that suffer from instabilities and violation of the null energy condition. Depending on the choice of f (R), the null energy condition is fulfilled in some subspaces of each model parameter space.