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Updated: Dec 12, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Alleviating the Tension in the Cosmic Microwave Background Using Planck-Scale Physics
Abhay Ashtekar1, Brajesh Gupt1, Donghui Jeong2
1Institute for Gravitation and the Cosmos & Physics Department, Penn State University, University Park, Pennsylvania 16801, USA.
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.
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