Ashtekar, A.Gupt, B.Jeong, D.Sreenath, V.2026-02-052020Physical Review Letters, 2020, 125, 5, pp. -319007https://doi.org/10.1103/PhysRevLett.125.051302https://idr.nitk.ac.in/handle/123456789/23810Certain 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.Power spectrumB-Mode polarizationCosmic microwave backgroundsLarge-scalesLoop quantum cosmologiesOptical depthPlanck scaleSpecific powerCosmologyarticlecosmosmicrowave radiationoptical depthphysicspolarizationpower spectrumpredictiontension