Speaker
Description
It has been shown that Loop Quantum Cosmology (LQC) has the potential to alleviate anomalies related to large scale power suppression, the lensing amplitude and te parity asymmetry present in observations of the CMB. As a consequence of the pre-inflationary dynamics, some modes reach the onset of inflation in an excited state with respect to the Bunch-Davies vacuum, resulting in a scale dependence of the primordial power spectrum for large scales. The choice of vacuum state in the pre-inflationary regime and free parameters of the theory impact the concrete predictions. In this work we investigate the consequences of choosing the non-oscillatory vacuum of cosmological perturbations. We perform a Bayesian analysis of the hybrid LQC model, contrasting with observations from the CMB, so that we can obtain constraints on free parameters and find whether whether it is capable of alleviating these anomalies.
