Speaker
Antonio Vicente-Becerril
(IEM-CSIC (Madrid))
Description
In this talk, I examine the impact of the hybrid and dressed-metric quantization approaches in loop quantum cosmology (LQC) on the angular power spectrum of cosmological perturbations. We introduce a new parametrization of the primordial power spectrum which depends on the characteristics of the quantum bounce epoch. For a total cosmic expansion of about 140 e-folds, the model predicts a suppression of power at low multipoles, while maintaining excellent agreement with Planck Collaboration observations at high multipoles. These results provide a consistent framework to probe potential imprints of LQC in the cosmic microwave background and open the door to future studies based on detailed Bayesian analyses of cosmological data.
Authors
Ms
Almudena Guillén
(IEM-CSIC (Madrid))
Antonio Vicente-Becerril
(IEM-CSIC (Madrid))
Guillermo A. Mena Marugán
(IEM, CSIC)
Mr
Kai Langer
(Institute for Quantum Gravity, Theoretical Physics III, Department of Physics, Friedrich-Alexander-Universit\"at Erlangen-N\"urnberg, Staudtstr. 7, 91058 Erlangen, Germany.)
Mr
Niklas Rodenbücher
(Institute for Quantum Gravity, Theoretical Physics III, Department of Physics, Friedrich-Alexander-Universit\"at Erlangen-N\"urnberg, Staudtstr. 7, 91058 Erlangen, Germany.)