Constraints on the primordial curvature power spectrum by pulsar timing array data: a polynomial parameterization approach
Q Fei - Communications in Theoretical Physics, 2024 - iopscience.iop.org
The recent stochastic signal observed jointly by NANOGrav, parkes pulsar timing array,
European pulsar timing array, and Chinese pulsar timing array can be accounted for by …
European pulsar timing array, and Chinese pulsar timing array can be accounted for by …
Dynamical analysis with thermodynamic aspects of anisotropic dark energy bounce cosmological model in f (R, G) gravity
SH Shekh - New astronomy, 2021 - Elsevier
Present analysis dedicated to the dynamical investigation of anisotropic dark energy LRS
Bianchi type-I cosmological model in the context of modified gravity in which Langrangian …
Bianchi type-I cosmological model in the context of modified gravity in which Langrangian …
Inflationary models with non-minimally derivative coupling
N Yang, Q Fei, Q Gao, Y Gong - Classical and Quantum Gravity, 2016 - iopscience.iop.org
We derive the general formulae for the scalar and tensor spectral tilts to the second order for
the inflationary models with non-minimally derivative coupling without taking the high friction …
the inflationary models with non-minimally derivative coupling without taking the high friction …
Energy conditions of the f (T, B) gravity dark energy model with the validity of thermodynamics
In this article, the analysis of Tsallis holographic dark energy (which turns into holographic
dark energy for a particular choice of positive non-additivity parameter δ) in modified f (T, B) …
dark energy for a particular choice of positive non-additivity parameter δ) in modified f (T, B) …
Cosmic and thermodynamic study of non-canonical scalar field in parameterized modified gravity
Cosmological and thermodynamic implications of non-canonical scalar field are investigated
in the cubic gravity by assuming various parameterizations (linear, Chevallier-Polarski …
in the cubic gravity by assuming various parameterizations (linear, Chevallier-Polarski …
Phase transition of charged black holes in massive gravity through new methods
Motivated by providing preliminary steps to understand the conception of quantum gravity, in
this paper, we study the phase structure of a semiclassical gravitational system. We …
this paper, we study the phase structure of a semiclassical gravitational system. We …
(ωT− ωT′)-phase space analysis of interacting Tsallis holographic dark energy in f (Q) gravity
In the present analysis the cosmological evolution of an interacting scenario between Tsallis
holographic dark energy (THDE) and pressure less dark matter with Hubble's scale as IR …
holographic dark energy (THDE) and pressure less dark matter with Hubble's scale as IR …
Thermodynamics in f (R, RαβRαβ, ϕ) theory of gravity
M Zubair, F Kousar, S Bahamonde - Physics of the Dark Universe, 2016 - Elsevier
First and second laws of black hole thermodynamics are examined at the apparent horizon
of FRW spacetime in f (R, R α β R α β, ϕ) gravity, where R, R α β R α β and ϕ are the Ricci …
of FRW spacetime in f (R, R α β R α β, ϕ) gravity, where R, R α β R α β and ϕ are the Ricci …
The reconstruction of non-minimal derivative coupling inflationary potentials
We derive the reconstruction formulae for the inflation model with the non-minimal derivative
coupling term. If reconstructing the potential from the tensor-to-scalar ratio r, we could obtain …
coupling term. If reconstructing the potential from the tensor-to-scalar ratio r, we could obtain …
[HTML][HTML] Constraints on primordial curvature power spectrum with kination era: Insights from NANOGrav 15-year data set
Q Fei, F Shen - Nuclear Physics B, 2024 - Elsevier
The stochastic signal detected by the NANOGrav, PPTA, EPTA, and CPTA collaborations
can be attributed to gravitational waves induced by the primordial curvature perturbations …
can be attributed to gravitational waves induced by the primordial curvature perturbations …