Speaker
Lisa Mickel
(University of Sheffield)
Description
Group field theory (GFT) is a background independent approach to quantum gravity that has been successfully applied to the cosmological setting and shown to have the potential for rich phenomenology. In this talk we will explore a novel proposal to construct operators in GFT based on symmetries of the action, whose expectation values can be interpreted as giving rise to an effective metric originating directly from the quantum theory. This construction relies on a relational coordinate system spanned by four massless scalar fields. We proceed to investigate the implications of this proposition for a flat homogeneous universe and its perturbations.
Primary author
Lisa Mickel
(University of Sheffield)
Co-author
Dr
Steffen Gielen
