Alleviating the Tension in the Cosmic Microwave Background Using Planck-Scale Physics

Abhay Ashtekar, Brajesh Gupt, Donghui Jeong, V. Sreenath

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Certain anomalies in the CMB bring out a tension between the six-parameter flat ΛCDM 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.

Original languageEnglish (US)
Article number051302
JournalPhysical review letters
Volume125
Issue number5
DOIs
StatePublished - Jul 31 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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