Observational exclusion of a consistent loop quantum cosmology scenario

Journal article
(Original article)

Publication Details

Author(s): Bolliet B, Barrau A, Grain J, Schander S
Journal: Physical Review D
Publisher: American Physical Society
Publication year: 2016
Volume: 93
Journal issue: 12
ISSN: 2470-0010
eISSN: 2470-0029
Language: English


It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations. In general, only very ad hoc scenarios or hyper fine-tuned initial conditions can lead to observationally testable theories. Here we consider a well-defined and well-motivated candidate quantum cosmology model that predicts inflation. Using the most recent observational constraints on the cosmic microwave background B-modes, we show that the model is excluded for all its parameter space, without any tuning. Some important consequences are drawn for the deformed algebra approach to loop quantum cosmology. We emphasize that neither loop quantum cosmology in general nor loop quantum gravity are disfavored by this study but their falsifiability is established.

FAU Authors / FAU Editors

Schander, Susanne
Chair for Theoretical Physics III (Quantum Gravity)

External institutions with authors

National Center for Scientific Research / Centre national de la recherche scientifique (CNRS)
University of Grenoble Alpes (UGA) / Université de Grenoble

How to cite

Bolliet, B., Barrau, A., Grain, J., & Schander, S. (2016). Observational exclusion of a consistent loop quantum cosmology scenario. Physical Review D, 93(12). https://dx.doi.org/10.1103/PhysRevD.93.124011

Bolliet, Boris, et al. "Observational exclusion of a consistent loop quantum cosmology scenario." Physical Review D 93.12 (2016).


Last updated on 2019-20-03 at 15:37