Speaker
Parampreet Singh
(Louisiana State University)
Description
To address the problem of time in canonical quantum gravity, one strategy is to use relational observables which results in the use of reference fields or clocks. We explore various ramifications of these clocks in the classical as well as quantum setting. First we show the way the choice of clocks is tied to gauge fixing and gauge invariant variables in the classical cosmological perturbation theory. Second, we discuss the way choice of clocks influences the loop quantization of inflationary spacetimes. Our results point to various subtleties in the use of the reference fields both in the classical and quantum theory.
Primary author
Parampreet Singh
(Louisiana State University)
Co-author
Kristina Giesel
(FAU Erlangen-Nürnberg)
