3 papers
gr-qc2025
Quantum cosmological background superposition and perturbation predictions
Kratika Mazde, Lisa Mickel, Patrick Peter
Predictions from early universe cosmology typically concern primordial perturbations generated during epochs where effects arising from the quantum nature of gravity may be importa…
gr-qc2025
Cosmological scalar perturbations for a metric reconstructed from group field theory
Steffen Gielen, Lisa Mickel
While homogeneous cosmologies have long been studied in the group field theory (GFT) approach to quantum gravity, including a quantum description of cosmological perturbations is h…
gr-qc2024
Reconstructing the metric in group field theory
Steffen Gielen, Lisa Mickel
We study a group field theory (GFT) for quantum gravity coupled to four massless scalar fields, using these matter fields to define a (relational) coordinate system. We exploit sym…