Alleviating the Tension in the Cosmic Microwave Background Using Planck-Scale Physics
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Date
2020
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American Physical Society subs@aip.org;revtex@aps.org;prx@aps.org;prxtex@aps.org;help@aps.org;prb@aps.org
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 k, with a specific power suppression. We conclude with a prediction of larger optical depth and power suppression in the B-mode polarization power spectrum on large scales. © 2020 American Physical Society.
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Keywords
Power spectrum, B-Mode polarization, Cosmic microwave backgrounds, Large-scales, Loop quantum cosmologies, Optical depth, Planck scale, Specific power, Cosmology, article, cosmos, microwave radiation, optical depth, physics, polarization, power spectrum, prediction, tension
Citation
Physical Review Letters, 2020, 125, 5, pp. -