141 citations · 494 across the 17 of their papers we have counts for
17 papers
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…
Transient Acceleration after Non-minimal M-flation Preheating
Amjad Ashoorioon, Kazem Rezazadeh
Light massive preheat fields acquire a non-vanishing dispersion during parametric resonance from their quantum particle production. This in turn will modify the inflaton potential,…
NANOGrav Signal from the End of Inflation and the LIGO Mass and Heavier Primordial Black Holes
Amjad Ashoorioon, Kazem Rezazadeh, Abasalt Rostami
Releasing the 12.5-year pulsar timing array data, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has recently reported the evidence for a stochastic co…
Structure Formation in Dark Matter Particle Production Cosmology
Z. Safari, K. Rezazadeh, B. Malekolkalami
We investigate a cosmological scenario in which the dark matter particles can be created during the evolution of the Universe. By regarding the Universe as an open thermodynamic sy…
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 …
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…
Mechanism of primordial black holes production and secondary gravitational waves in -attractor Galileon inflationary scenario
Zeinab Teimoori, Kazem Rezazadeh, Mariwan Ahmed Rasheed +1
We study the process of the Primordial Black Holes (PBHs) production in the novel framework, namely -attractor Galileon inflation (G-inflation) model. In our framework, we take…
The growth of DM and DE perturbations in DBI non-canonical scalar field scenario
K. Rezazadeh, S. Asadzadeh, K. Fahimi +2
We study the effect of varying sound speed on clustering dark energy in the Dirac-Born-Infeld (DBI) scenario. The DBI action is included in the class of -essence models, and it…
Non-Minimal M-flation
Amjad Ashoorioon, Kazem Rezazadeh
We show how in a matrix inflationary model in which there is a non-minimal coupling between the matrix inflatons and gravity --hence dubbed Non-$\MM$-flation-- some of the disadvan…
Warm DBI inflation with constant sound speed
S. Rasouli, K. Rezazadeh, A. Abdolmaleki +1
We study inflation with the Dirac-Born-Infeld (DBI) noncanonical scalar field in both the cold and warm scenarios. We consider the Anti-de Sitter warp factor for…
Structure formation in clustering DBI dark energy model with constant sound speed
K. Fahimi, K. Karami, S. Asadzadeh +1
Within the framework of DBI non-canonical scalar field model of dark energy, we study the growth of dark matter perturbations in the both linear and non-linear regimes. In our DBI…
Resurrecting the Power-law, Intermediate, and Logamediate Inflations in the DBI Scenario with Constant Sound Speed
Roonak Amani, Kazem Rezazadeh, Asrin Abdolmaleki +1
We investigate the power-law, intermediate, and logamediate inflationary models in the framework of DBI non-canonical scalar field with constant sound speed. In the DBI setting, we…
Logamediate Inflation in f(T) Teleparallel Gravity
Kazem Rezazadeh, Asrin Abdolmaleki, Kayoomars Karami
We study logamediate inflation in the context of teleparallel gravity. -gravity is a generalization of the teleparallel gravity which is formulated on the Weitzenböck…
Brans-Dicke inflation in light of the Planck 2015 data
B. Tahmasebzadeh, K. Rezazadeh, K. Karami
We study inflation in the Brans-Dicke gravity as a special model of the scalar-tensor gravity. We obtain the inflationary observables containing the scalar spectral index, the tens…
Power-law and intermediate inflationary models in f(T)-gravity
K. Rezazadeh, A. Abdolmaleki, K. Karami
We study inflation in the framework of -gravity in the presence of a canonical scalar field. After reviewing the basic equations governing the background cosmology in -…
Tachyon inflation with steep potentials
K. Rezazadeh, K. Karami, S. Hashemi
Within the framework of tachyon inflation, we consider different steep potentials and check their viability in light of the Planck 2015 data. We see that in this scenario, the inve…
Intermediate inflation from a non-canonical scalar field
K. Rezazadeh, K. Karami, P. Karimi
We study the intermediate inflation in a non-canonical scalar field framework with a power-like Lagrangian. We show that in contrast with the standard canonical intermediate inflat…