5–10 Jul 2021
Europe/Rome timezone

Predictions for the CMB in inflationary and anisotropic cosmologies

8 Jul 2021, 18:00
15m
Talk in the parallel session Loop quantum gravity: cosmology and black holes Loop Quantum Gravity: Cosmology and Black Holes

Speaker

Javier Olmedo (Universidad de Granada)

Description

The paradigm of slow-roll inflation provides a snapshot of the early universe that is in good agreement with present observations. Despite its success, most of the models studied so far rely heavily on the assumption that the universe is perfectly isotropic at early times. In this talk, I will discuss recent advances in anisotropic inflationary models. We adopt a Fock quantization for gauge-invariant perturbations. We evolve them through an anisotropic bounce within loop quantum cosmology. Despite anisotropies die out very rapidly just before the inflationary expansion, scalar and tensor perturbations keep memory of that anisotropic phase, and leave several types of anomalies in the Cosmic Microwave Background (CMB). With these imprints and current data, we constrain the departure from spatial isotropy of the early universe, as well as discuss modifications in the usual angular correlation functions and the generation of TB and EB correlations that are forbidden in the standard isotropic scenario.

Primary authors

Javier Olmedo (Universidad de Granada) Dr Ivan Agullo (Louisiana State University) Dr Sreenath Vijayakumar (National Institute of Technology Karnataka)

Presentation materials

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