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Tahereh Azizi

Tahereh Azizi

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

Research

Title
Gravitational wave polarization in exponential forms of f(R) gravity with coupling to matter
Type
JournalPaper
Keywords
Gravitational wave; polarization mode; modified gravity; nonminimal coupling; Newman–Penrose formalism.
Year
2020
Journal INTERNATIONAL JOURNAL OF MODERN PHYSICS D
DOI
Researchers Mojtaba Haghshenas ، Tahereh Azizi

Abstract

We investigate polarizations of gravitational waves in generalized theories of gravity whose action contains a nonminimal coupling (NMC) between an exponential function of f(R) gravity and the matter field. Specifically, we consider two classes of such models. In the first case, we assume an explicit NMC between the matter Lagrangian density and curvature while in the second case, we consider the exponential f(R) gravity coupled to the trace of the stress-energy tensor of a scalar field. Using the Newman–Penrose quantities, we show that these models can be considered as suitable choices in order to produce new polarization modes.