143 citations · 352 across the 19 of their papers we have counts for
19 papers
The Steep Price of No Hair in a Modified Loop Quantum Cosmology
Meysam Motaharfar, Parampreet Singh
A modified version of loop quantum cosmology model, the so-called mLQC-I, motivated by Thiemann's regularization of the Hamiltonian constraint, leads to the resolution of the big b…
Quantum Cosmology in Krylov Space: Complexity and Entropy
Meysam Motaharfar, Maxwell R. Siebersma, Parampreet Singh
We study the quantum dynamics in Krylov space of a spatially flat, homogeneous, and isotropic universe sourced with a massless scalar field within Wheeler-DeWitt (WDW) quantum cosm…
Echoes of Love Beyond the Horizon: A Bridge to Recovering Information from Black Holes
Meysam Motaharfar, Parampreet Singh
We provide further evidence that information is preserved during black hole evaporation and may be recoverable, provided quantum gravitational effects resolve the singularity. We d…
Love Numbers of Covariant Loop Quantum Black Holes
Meysam Motaharfar, Parampreet Singh
We investigate the linear static response of three covariant loop quantum black holes, namely, the two models proposed by Zhang, Lewandowski, Ma, and Yang (ZLMY) and the Alonso-Bar…
Loop Quantum Gravitational Signatures via Love Numbers
Meysam Motaharfar, Parampreet Singh
Loop quantum gravitational effects can resolve the central singularity of black holes while potentially leaving tiny traces of quantization in the exterior spacetime. We show the w…
Anisotropic non-singular quantum bounce as a seesaw and amplification mechanism for magnetic fields
Meysam Motaharfar, Parampreet Singh
We investigate the evolution of a homogeneous magnetic field within Bianchi-I loop quantum cosmology, in which the big bang singularity is replaced with an anisotropic quantum boun…
Constraining regularization ambiguities in Loop Quantum Cosmology via CMB
Bao-Fei Li, Meysam Motaharfar, Parampreet Singh
In order to investigate the potential observational signals of different regularization ambiguities in loop quantum cosmological models, we systematically compute and compare the p…
On the classicality and uniqueness in loop quantization of Bianchi-I spacetimes
Meysam Motaharfar, Parampreet Singh, Eklavya Thareja
In loop quantum cosmology, ambiguities in the Hamiltonian constraint can result in models with varying phenomenological predictions. In the homogeneous isotropic models, these ambi…
Quantum gravitational non-singular tunneling wavefunction proposal
Meysam Motaharfar, Parampreet Singh
It was recently shown that tunneling wavefunction proposal is consistent with loop quantum geometry corrections including both holonomy and inverse scale factor corrections in the…
Recent developments in warm inflation
Vahid Kamali, Meysam Motaharfar, Rudnei O. Ramos
Warm inflation, its different particle physics model implementations and the implications of dissipative particle production for its cosmology are reviewed. First, we briefly prese…
Tunneling wavefunction proposal with loop quantum geometry effects
Meysam Motaharfar, Parampreet Singh
In Vilenkin's tunneling wavefunction proposal our expanding universe is born via a tunneling through a barrier from nothing at the zero scale factor. We explore the viability of th…
Dirac-Born-Infeld warm inflation realization in the strong dissipation regime
Meysam Motaharfar, Rudnei O. Ramos
We consider warm inflation with a Dirac-Born-Infeld (DBI) kinetic term in which both the nonequilibrium dissipative particle production and the sound speed parameter slow the motio…
On the role of dissipative effects in the quantum gravitational onset of warm Starobinsky inflation in a closed universe
Meysam Motaharfar, Parampreet Singh
A problematic feature of low energy scale inflationary models, such as Starobinsky inflation, in a spatially closed universe is the occurrence of a recollapse and a big crunch sing…
Warm brane inflation with an exponential potential: A consistent realization away from the swampland
Vahid Kamali, Meysam Motaharfar, Rudnei O. Ramos
It has very recently been realized that coupling branes to higher dimensional quantum gravity theories and considering the consistency of what lives on the branes, one is able to u…
Warm inflation as a way out of the swampland
Meysam Motaharfar, Vahid Kamali, Rudnei O. Ramos
We discuss how dissipative effects and the presence of a thermal radiation bath, which are inherent characteristics of the warm inflation dynamics, can evade the recently proposed…
Warm Higgs G-inflation: predictions and constraints from Planck 2015 likelihood
Maysam Motaharfar, Erfan Massaeli, Hamid Reza Sepangi
We reconsider a recently proposed warm G-inflation scenario in which the Galileon scalar field concurrently dissipates its kinetic energy as the radiation fluid throughout inflatio…
Tachyon warm inflation with the effects of Loop Quantum Cosmology in the light of Planck 2015
Vahid Kamali, Spyros Basilakos, Ahmad Mehrabi +2
We investigate the observational signatures of quantum cosmology in the Cosmic Microwave Background data provided by Planck collaboration. We apply the warm inflationary paradigm w…
General Scalar-Tensor cosmology: Analytical solutions via Noether symmetry
Erfan Masaeli, Meysam Motaharfar, Hamid Reza Sepangi
We analyze the cosmology of a general Scalar-Tensor theory which encompasses generalized Brans-Dicke theory, Gauss-Bonnet gravity, non-minimal derivative gravity, generalized Galil…
Warm-tachyon Gauss-Bonnet inflation in the light of Planck 2015 data
Maysam Motaharfar, Hamid Reza Sepangi
We study a warm-tachyon inflationary model non-minimally coupled to a Gauss-Bonnet term. The general conditions required for reliability of the model are obtained by considerations…