4 papers
Master functions and hybrid quantization of perturbed nonrotating black hole interiors
Michele Lenzi, Guillermo A. Mena Marugán, Andrés MÃnguez-Sánchez
Master functions of black holes are fundamental tools in gravitational-wave physics and are typically derived within a Lagrangian framework. Starting from the Kantowski-Sachs geome…
Computing the graph-changing dynamics of loop quantum gravity
Thiago L. M. Guedes, Guillermo A. Mena Marugán, Francesca Vidotto +1
In loop quantum gravity (LQG), states of the gravitational field are represented by labeled graphs called spin networks. Their dynamics can be described by a Hamiltonian constraint…
Polar perturbations in Kantowski-Sachs spacetimes and hybrid quantum cosmology
Guillermo A. Mena Marugán, Andrés MÃnguez-Sánchez
Increasing attention has been recently devoted to the study of Kantowski-Sachs spacetime as a way to explore the interior of a Schwarzschild black hole. In this work, we construct…
Choice of vacuum state and the relation between inflationary and Planck scales
Maciej Kowalczyk, Guillermo A. Mena Marugán
Recent observations about the cosmic microwave background evidence a clear discrepancy between the scale of inflation and the Planck scale expected in the conventional inflationary…