219 citations · 2.2k across the 94 of their papers we have counts for
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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…
Hamiltonian formalism, master functions and Darboux transformations for perturbed (interiors and exteriors of) nonrotating black holes
Michele Lenzi, Guillermo A. Mena Marugán, Andrés Mínguez-Sánchez +1
Motivated by their relevance to the interior of nonrotating black holes, classical and quantum Kantowski-Sachs cosmologies have recently attracted increasing attention. This intere…
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…