Probing the interior of the Schwarzschild black hole using congruences: lqg vs. gup

S Rastgoo, S Das - Universe, 2022 - mdpi.com
We review, as well as provide some new results regarding the study of the structure of
spacetime and the singularity in the interior of the Schwarzschild black hole in both loop …

Black hole singularity resolution via the modified Raychaudhuri equation in loop quantum gravity

K Blanchette, S Das, S Hergott, S Rastgoo - Physical Review D, 2021 - APS
We derive loop quantum gravity corrections to the Raychaudhuri equation in the interior of a
Schwarzschild black hole and near the classical singularity. We show that the resulting …

Deformed algebra and the effective dynamics of the interior of black holes

P Bosso, O Obregón, S Rastgoo… - Classical and Quantum …, 2021 - iopscience.iop.org
We consider the classical Hamiltonian of the interior of the Schwarzschild black hole in
Ashtekar–Barbero connection formalism. Then, inspired by generalized uncertainty principle …

Propagation of quantum gravity-modified gravitational waves on a classical FLRW spacetime

A Garcia-Chung, JB Mertens, S Rastgoo, Y Tavakoli… - Physical Review D, 2021 - APS
The linearized Einstein field equations provide a low-energy wave equation for the
propagation of gravitational fields which may originate from a high-energy source. Motivated …

Effective GUP-modified Raychaudhuri equation and black hole singularity: four models

K Blanchette, S Das, S Rastgoo - Journal of High Energy Physics, 2021 - Springer
A bstract The classical Raychaudhuri equation predicts the formation of conjugate points for
a congruence of geodesics, in a finite proper time. This in conjunction with the Hawking …

Protected SL (2, ℝ) symmetry in quantum cosmology

JB Achour, E Livine - Journal of Cosmology and Astroparticle …, 2019 - iopscience.iop.org
The polymer quantization of cosmological backgrounds provides an alternative path to the
original Wheeler-de Witt (WdW) quantum cosmology, based on a different representation the …

Black hole interior quantization: a minimal uncertainty approach

P Bosso, OJ Obregon, S Rastgoo… - Classical and Quantum …, 2024 - iopscience.iop.org
In a previous work we studied the interior of the Schwarzschild black hole implementing an
effective minimal length, by applying a modification to the Poisson brackets of the theory. In …

Effective dynamics of the Schwarzschild black hole interior with inverse triad corrections

HA Morales-Técotl, S Rastgoo, JC Ruelas - Annals of Physics, 2021 - Elsevier
We reconsider the study of the interior of the Schwarzschild black hole now including
inverse triad quantum corrections within loop quantization. We derive these corrections and …

What do gravitational wave detectors say about polymer quantum effects?

A Garcia-Chung, MF Carney, JB Mertens… - … of Cosmology and …, 2022 - iopscience.iop.org
We compute the expected response of detector arms of gravitational wave observatories to
polymerized gravitational waves. The mathematical and theoretical features of these waves …

Constraining the quantum gravity polymer scale using LIGO data

A Garcia-Chung, MF Carney, JB Mertens… - … and Quantum Gravity, 2023 - iopscience.iop.org
We present the first empirical constraints on the polymer scale describing polymer quantized
GWs propagating on a classical background. These constraints are determined from the …