Alleviating the Tension in the Cosmic Microwave Background using Planck-Scale Physics
Cosmology and Nongalactic Astrophysics
2020-08-05 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Certain anomalies in the CMB bring out a tension between the six-parameter flat CDM model and the CMB data. We revisit the PLANCK analysis with loop quantum cosmology (LQC) predictions and show that LQC alleviates both the large-scale power anomaly and the tension in the lensing amplitude. These differences arise because, in LQC, the primordial power spectrum is scale dependent for small , with a specific power suppression. We conclude with a prediction of larger optical depth and power suppression in the -mode polarization power spectrum on large scales.
Keywords
Cite
@article{arxiv.2001.11689,
title = {Alleviating the Tension in the Cosmic Microwave Background using Planck-Scale Physics},
author = {Abhay Ashtekar and Brajesh Gupt and Donghui Jeong and V. Sreenath},
journal= {arXiv preprint arXiv:2001.11689},
year = {2020}
}
Comments
6 pages, 5 figures, 1 table. The version that appeared in PRL. A few clarifications and several references added