Speaker
Monica Rincon Ramirez
(Pennsylvania State University)
Description
The Barbero-Immirzi parameter appears in the EPRL spinfoam model via a duality rotation. In an effective field theory description, this duality rotation results in a relation between the coupling constants of parity-even and parity-odd higher-curvature terms. We study cosmic inflation in this effective theory and show that the observation of a primordial tensor polarization, together with the tensor tilt and the tensor-to-scalar ratio, provides a measurement of the Barbero-Immirzi parameter and, therefore, of the scale of the discreteness in loop quantum gravity.
Authors
Eugenio Bianchi
(PennState)
Monica Rincon Ramirez
(Pennsylvania State University)
