Time problem in primordial perturbations
General Relativity and Quantum Cosmology
2024-05-08 v4
Abstract
We study the non-unitary relation between quantum gravitational models defined using different internal times. We show that despite the non-unitarity, it is possible to provide a prescription for making unambiguous, though restricted, physical predictions independent of specific clocks. To illustrate this result, we employ a model of quantum gravitational waves in a quantum Friedmann universe.
Cite
@article{arxiv.2401.06887,
title = {Time problem in primordial perturbations},
author = {Alice Boldrin and Przemysław Małkiewicz and Patrick Peter},
journal= {arXiv preprint arXiv:2401.06887},
year = {2024}
}
Comments
Corrected typos