Gravitons in fractional action cosmology

RA El-Nabulsi - International Journal of Theoretical Physics, 2012 - Springer
Massive gravity based on the fractional action cosmology is discussed. In this new picture,
the new theory requires the introduction, in addition to the ordinary graviton mass, fractional …

LISA sensitivities to gravitational waves from relativistic metric theories of gravity

M Tinto, MES Alves - Physical Review D—Particles, Fields, Gravitation, and …, 2010 - APS
The direct observation of gravitational waves will provide a unique tool for probing the
dynamical properties of highly compact astrophysical objects, mapping ultrarelativistic …

Can massive gravitons be an alternative to dark energy?

MES Alves, OD Miranda, JCN de Araujo - Physics Letters B, 2011 - Elsevier
In this work, we explore some cosmological implications of the model proposed by M. Visser
in 1998. In his approach, Visser intends to take into account mass for the graviton by means …

Exact amplitudes of six polarization modes for gravitational waves

YH Hyun, Y Kim, S Lee - Physical Review D, 2019 - APS
The exact amplitudes of six polarization modes of gravitational waves are constructed in
terms of both the small metric perturbations and the Newman-Penrose scalars. The obtained …

Dark Matter as a Non-Relativistic Bose–Einstein Condensate with Massive Gravitons

E Kun, Z Keresztes, S Das, LÁ Gergely - Symmetry, 2018 - mdpi.com
We confront a non-relativistic Bose–Einstein Condensate (BEC) model of light bosons
interacting gravitationally either through a Newtonian or a Yukawa potential with the …

Quintessence cosmology with a traversable wormhole, massive decaying gravitons and with varying G and Λ

AR El-Nabulsi - Astrophysics and Space Science, 2010 - Springer
In this work, we explore many cosmological implications of a four-dimensional cosmology
dominated by quintessence with a static traversable wormhole, spatio-temporal varying G …

Dynamics and constraints of the massive graviton dark matter flat cosmologies

S Basilakos, M Plionis, MES Alves, JAS Lima - Physical Review D—Particles …, 2011 - APS
We discuss the dynamics of the Universe within the framework of the massive graviton cold
dark matter scenario (MGCDM) in which gravitons are geometrically treated as massive …

Cosmological constant constraints from observation-derived energy condition bounds and their application to bimetric massive gravity

MES Alves, FC Carvalho, JCN De Araujo… - The European Physical …, 2018 - Springer
Among the various possibilities to probe the theory behind the recent accelerated expansion
of the universe, the energy conditions (ECs) are of particular interest, since it is possible to …

Accelerated universe with a traversable wormhole from Visser's massive gravity

RA El-Nabulsi - Journal of the Korean Physical Society, 2021 - Springer
In this letter, the Friedmann–Robertson–Walker model with a traversable wormhole is
considered from the view point of Visser's massive gravity theory. If the matter in the universe …

Observational constraints on Visser's cosmological model

MES Alves, FC Carvalho, JCN de Araujo… - Physical Review D …, 2010 - APS
Theories of gravity for which gravitons can be treated as massive particles have presently
been studied as realistic modifications of general relativity, and can be tested with …