A comparison of different choices of clocks in a reduced phase space quantization in loop quantum cosmology with an inflationary potential using effective techniques

Giesel K, Li BF, Singh P (2023)

Publication Type: Conference contribution

Publication year: 2023

Original Authors: Kristina Giesel, Bao-Fei Li, Parampreet Singh

Series: The Sixteenth Marcel Grossmann Meeting, pp. 4228-4233 (2023)

Event location: Rome

Abstract

We review recent results that apply a reduced phase space quantization of loop quantum cosmology (LQC) for a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) universe filled with reference fields and an inflaton field in a Starobinsky inflationary potential. All three models that we consider are two-fluid models and they differ by their choice of global clock which are chosen to be either Gaussian dust, Brown-Kuchař dust or a massless Klein-Gordon scalar field. Although two-fluid models are more complicated than models involving the inflaton only, it turns out that some of the technical hurdles in conventional quantum cosmological models can be bypassed in these models. Using the effective dynamics resulting from the reduced phase space quantization we discuss some phenomenological implications of these models including the resolution of the big bang singularity via a quantum bounce and in addition address the question whether different choices of clocks can leave an imprint on the inflationary dynamics.

Authors with CRIS profile

Kristina Giesel Professur für Theoretische Physik

Involved external institutions

Louisiana State University

United States (USA) (US)

How to cite

APA:

Giesel, K., Li, B.-F., & Singh, P. (2023). A comparison of different choices of clocks in a reduced phase space quantization in loop quantum cosmology with an inflationary potential using effective techniques. In Proceedings of the The Sixteenth Marcel Grossmann Meeting, pp. 4228-4233 (2023). Rome, IT.

MLA:

Giesel, Kristina, Bao-Fei Li, and Parampreet Singh. "A comparison of different choices of clocks in a reduced phase space quantization in loop quantum cosmology with an inflationary potential using effective techniques." Proceedings of the The Sixteenth Marcel Grossmann Meeting, pp. 4228-4233 (2023), Rome 2023.

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