3 citations · 3 across the 3 of their papers we have counts for
8 papers
Robustness of the primordial power spectrum in hybrid loop quantum cosmology to approximations near the bounce
Kristina Giesel, Almudena Guillén, Guillermo A. Mena Marugán +1
We prove the robustness of the analytic approximation used in (hybrid) loop quantum cosmology to compute the primordial power spectrum of the cosmological perturbations for a recen…
Quasinormal modes in effective loop quantum gravity and consequences for isospectrality
Alejandro García-Quismondo, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros
We investigate the quasinormal mode spectra of axial and polar perturbations about the effective Ashtekar, Olmedo, and Singh black hole geometry within the hybrid approach to loop…
Parametrization of the primordial power spectrum in loop quantum cosmology
Almudena Guillén, Kai Langer, Guillermo A. Mena Marugán +2
We investigate the imprints on the angular power spectra of cosmological perturbations of a pre-inflationary bounce phase, as described by the hybrid and dressed metric approaches…
Master variables and Darboux symmetry for axial perturbations of the exterior and interior of black hole spacetimes
Michele Lenzi, Guillermo A. Mena Marugán, Andrés MÃnguez-Sánchez +1
Recent efforts have shown that Kantowski-Sachs spacetime provides a useful framework for analyzing perturbations inside a Schwarzschild black hole (BH). In these studies, the adopt…
Expansion-sensitive coupling of a local quantum system in de Sitter cosmology
Jorma Louko, Guillermo A. Mena Marugán, Alvaro Torres-Caballeros
When a local quantum system couples to a quantum field in a cosmological spacetime, the time dependence of the coupling strength is conventionally taken to reflect the design of th…
Starobinsky potential and power suppression in hybrid Loop Quantum Cosmology
Marceau Henry, Guillermo A. Mena Marugán, Antonio Vicente-Becerril
We study the effect on the primordial tensor power spectrum of varying the number of e-folds during slow-roll inflation in Loop Quantum Cosmology with a Starobinsky potential. Usin…