283 citations · 4k across the 142 of their papers we have counts for
143 papers
Bound States Inside the Horizon and Black Hole Entropy
Hassan Firouzjahi
We study the bound states perturbations in the interior of the Schwarzschild black hole and examine whether or not their microstates spectrum can furnish a statistical description…
Models with Non-minimal Coupling in Primordial Universe and Cosmological Observations
Alireza Talebian, Hassan Firouzjahi, Fereshteh Felegary
A non-minimal coupling between gravity and the inflaton field is a generic contribution in inflationary cosmology. In this work, we consider models of inflation with a non-minimal…
Regular Black Holes from Anisotropic Source with Hydrodynamic Equation of State
Hassan Firouzjahi
We study regular black hole solutions sourced by an anisotropic energy momentum tensor. It is well known that the geometry of the interior of a spherically symmetric regular black…
Bound State Perturbations in the Interior of Black Holes
Hassan Firouzjahi
We revisit our earlier work and investigate the bound state perturbations in the interior of the Schwarzschild black hole. The bound sates are defined as the perturbations in the i…
Gravitational Bound State Perturbations Inside Black Holes and Isospectrality
Hassan Firouzjahi, Kazem Rezazadeh, Masoud Molaei
We study the bound state solutions for the polar perturbations in the interior of the Schwarzschild black hole. It is shown that for a given value of the spherical harmonic index $…
Trispectrum in Extended USR Model with Transition to SR
Hassan Firouzjahi, Amin Nassiri-Rad
We study the trispectrum in a two-phase USR-SR setup of inflation in which the USR stage is extended in the initial phase of inflation while the second stage of inflation proceeds…