Abstract
Certain anomalies in the CMB bring out a tension between the six-parameter flat 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.
- Received 2 February 2020
- Revised 19 May 2020
- Accepted 9 July 2020
DOI:https://doi.org/10.1103/PhysRevLett.125.051302
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