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Primordial power spectrum from the Dapor–Liegener model of loop quantum cosmology

Editor’s Choice (Research Article)

Abstract

We compute the predictions for the power spectrum of scalar perturbations from a recent new proposal for the effective Hamiltonian of loop quantum cosmology. The model provides an attractive picture of the early cosmos, in which our classical Friedmann–Lemaître–Robertson–Walker universe emerges from a quantum phase where the spacetime curvature remains constant and of Planckian size. We compare the predictions for the cosmic microwave background with previous results obtained within loop quantum cosmology, and discuss the differences and similarities. The analysis provides an example of the way differences between quantization schemes can be translated to physical observables.

Keywords

Quantum cosmology Loop quantum gravity Cosmic microwave background 

Notes

Acknowledgements

We thank A. Ashtekar, J. Olmedo, J. Pullin, S. Sahini, and P. Singh for stimulating discussions. We specially thank A. Dapor and T. Pawloswski for discussions and initial collaboration on this project, and A. Ashtekar for useful comments on the manuscript. This work has been supported by the NSF CAREER grant PHY-1552603, and funds of the Hearne Institute for Theoretical Physics.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physics and AstronomyLouisiana State UniversityBaton RougeUSA

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