256 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Research Institute for Astronomy and Astrophysics of MaraghIR67 papers
- Islamic Azad University Sanandaj BranchIR27 papers
- Institute for Research in Fundamental SciencesIR26 papers
- Shahid Bahonar University of KermanIR15 papers
- Institute for Advanced Studies in Basic SciencesIR14 papers
- National University of Sciences and TechnologyPK14 papers
- Razi UniversityIR9 papers
- Bu-Ali Sina UniversityIR8 papers
- Azarbaijan Shahid Madani UniversityIR7 papers
- Urmia University of TechnologyIR7 papers
- Kansas State UniversityUS6 papers
- Yerevan State UniversityAM6 papers
124 papers · 1 filter
Revisited apparent horizon entropy and GSL in modified gravity
Soma Heydari, Parastoo Askari, Kayoomars Karami
This work presents a universal and revisited formalism for the entropy of the apparent horizon in modified gravity to investigate the validity of the Generalized Second Law (GSL) o…
Structure formation in a non-canonical scalar field model of clustering dark energy
Zanyar Ebrahimi, Kayoomars Karami
This paper examines the growth of dark matter and dark energy perturbations within a non-canonical scalar field model characterized by an exponential potential. Through dynamical s…
Loop quantum inflation with inverse volume corrections in light of ACT data
Farough Parvizi, Soma Heydari, Milad Solbi +1
Within the framework of loop quantum cosmology (LQC), we investigate the effect of inverse volume corrections on the low scale spontaneously broken supersymmetric (SB SUSY) and exp…
Alleviating the tension in Rastall gravity
R. Mohebi, Kh. Saaidi T. Golanbari, K. Karami
The persistent discrepancy between local determinations of the Hubble constant and the Planck 2018 value () within CDM remains a c…
Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
Karam Bahari, Soma Heydari, Kayoomars Karami
Here, a natural non-canonical inflationary model based on a power-law Lagrangian is investigated. We analyze the scalar spectral index and the tensor-to-scalar ratio $r…
Breaking the degeneracy of non-canonical quartic inflation by reheating considerations
Iraj Safaei, Kayoomars Karami
Here, the quartic inflationary potential within a non-canonical framework characterized by a power-law Lagrangian is investigated. We demonstrate that the predi…
Primordial black holes in non-minimal Gauss-Bonnet inflation in light of the PTA data
Milad Solbi, Kayoomars Karami
Here, we investigate the formation of primordial black holes (PBHs) in non-minimal coupling Gauss-Bonnet inflationary model in the presence of power-law potentials. We employ a two…
Primordial black holes and secondary gravitational waves from generalized power-law non-canonical inflation with quartic potential
Soma Heydari, Kayoomars Karami
Here, generation of PBHs and secondary GWs from non-canonical inflation with quartic potential have been probed. It is illustrated that, quartic potential in non-canonical setup wi…
Estimated Age of the Universe in Fractional Cosmology
Emanuel Wallison de Oliveira Costa, Raheleh Jalalzadeh, Pedro Felix da Silva Júnior +2
Our proposed cosmological framework, which is based on fractional quantum cosmology, aims to address the issue of synchronicity in the age of the universe. To achieve this, we have…
Inflation Based on the Tsallis Entropy
Zeinab Teimoori, Kazem Rezazadeh, Abasat Rostami
We study the inflationary scenario in the Tsallis entropy-based cosmology. The Friedmann equations in this setup can be derived by using the first law of thermodynamics. To derive…
Generalized second law of thermodynamics in massive gravity
Mohammad Beigmohammadi, Kayoomars Karami
Here, we study the generalized second law (GSL) of thermodynamics in the framework of massive gravity. To do this, we consider a FRW universe filled only with matter and enclosed b…
Probing extra dimensions through cosmological observations of dark energy
R. Jalalzadeh, S. Jalalzadeh, B. Malekolkalami
We investigate the isometrically embedded Bianchi type-V cosmology braneworld model in a -dimensional bulk space. The model provides a fluid of geometric dark energy (GDE) and u…
Wormhole solution in modified teleparallel-Rastall gravity and energy conditions
N. Nazavari, Kh. Saaidi, Abolhassan Mohammadi
The possibility of static and spherically symmetric traversable wormhole solution in modified teleparallel Rastall gravity (MTRG) in a non-diagonal tetrad is investigated. Rastall…
Tsallis holographic inflation in gravity: CMB constraints, reheating, and swampland implications
S. Taghavi, T. Golanbari, Kh. Saaidi
Understanding how early-universe inflation may emerge from generalized holographic energy densities within modified gravity motivates the present analysis. We develop a self-consis…
A quantum cosmology approach to cosmic coincidence and inflation
S. Jalalzadeh, A. Mohammadi, D. Demir
This work studies the quantum cosmology of a closed, spatially homogeneous, and isotropic FLRW minisuperspace model with electromagnetic radiation as a matter content. We solve the…
Warm constant-roll inflation in brane-world cosmology
Mohammad Reza Setare, Arvin Ravanpak, Karam Bahari +1
In this article we study a constant-roll inflationary model in the context of brane-world cosmology caused by a quintessence scalar field for warm inflation with a constant dissipa…
Primordial black holes ensued from exponential potential and coupling parameter in nonminimal derivative inflation model
Soma Heydari, Kayoomars Karami
Here, Primordial Black Holes (PBHs) creation from exponential potential has been inquired, through gravitationally raised friction emanated from the nonminimal coupling between gra…
Non-Gaussianity and Secondary Gravitational Waves from Primordial Black Holes Production in -attractor Inflation
Kazem Rezazadeh, Zeinab Teimoori, Saeid Karimi +1
We study the non-Gaussianity and secondary Gravitational Waves (GWs) in the process of the Primordial Black Holes (PBHs) production from inflation. In our work, we focus on the …
Higher order mimetic gravity after GW170817
Kimya Sharafati, Soma Heydari, Kayoomars Karami
On the 17th of August 2017, the thriving discovery of gravitational waves event GW170817 and its optical counterpart GRB170817A, owing to coalescing of two neutron starts divulged…
Holographic warm inflation
Abolhassan Mohammadi
The increasing interest in studying the role of holographic dark energy in the evolution of the very early universe motivates us to study it for the scenario of warm inflation. Due…
Primordial black holes formation and secondary gravitational waves in nonminimal derivative coupling inflation
Zeinab Teimoori, Kazem Rezazadeh, Kayoomars Karami
We study the possibility of the Primordial Black Holes (PBHs) formation with the aim of finding a considerable fraction of Dark Matter (DM), using the gravitationally enhanced fric…
Primordial black holes in nonminimal derivative coupling inflation with quartic potential and reheating consideration
Soma Heydari, Kayoomars Karami
We investigate the generation of Primordial Black Holes (PBHs) with the aid of gravitationally increased friction mechanism originated from the NonMinimal field Derivative Coupling…
Nonminimal coupling inflation with constant slow roll
Mehdi Shokri, Jafar Sadeghi, Mohammad Reza Setare +1
We study a single field inflationary model modified by a non-minimal coupling term between the Ricci scalar and the scalar field in the context of constant-roll inflation.…
The generalized and in non-minimal constant-roll inflation
Mehdi Shokri, Jafar Sadeghi, Mohammad Reza Setare
In the present work, we consider the non-minimal coupling inflationary model in the context of the constant-roll idea which is investigated by the first-order formalism. We attempt…