Primary gravitational waves at high frequencies II: Emergence of the exponential cut-off in the power spectrum

arXiv:2605.18286 · astro-ph.CO, gr-qc, hep-th · Submitted 2026-05-18 · Read on arXiv

astro-ph.CO, gr-qc, hep-th

Submitted: 2026-05-18

Updated: 2026-09-01

Comments: v1: 42 pages, 6 figures; v2: 45 pages, 6 figures, accepted in JCAP

Journal ref: JCAP 09 (2026) 030

DOI: 10.1088/1475-7516/2026/09/030

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Regularization — 16× in this paper · explained in 3 episodes
• Reheating — 10× in this paper · explained in 2 episodes
• Einstein Telescope — 4× in this paper
• Cosmic Explorer — 3× in this paper
• Big Bang Observer — 2× in this paper
• CERN Axion Solar Telescope — 2× in this paper
• Laser Interferometer Space Antenna — 2× in this paper
• Indian Institute of Technology — 1× in this paper
• Matter-wave Atomic Gradiometer Interferometric Sensor — 1× in this paper
• Square Kilometer Array — 1× in this paper
• Superconducting Quantum Materials and Systems Center — 1× in this paper
• pulsar timing arrays — 1× in this paper · explained in 2 episodes

Sources

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• Planck 2018 results. X. Constraints on inflation
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from multi-tracer BAO analysis with galaxies and voids
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Gravitational waves from inflation
• Cosmological Backgrounds of Gravitational Waves
• Scalar induced gravitational waves review
• Using gravitational waves to see the first second of the Universe
• Gravitational wave astronomy and the expansion history of the Universe
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Primordial Gravitational Waves in Nonstandard Cosmologies
• Primordial Gravitational Wave Signals in Modified Cosmologies
• Decoding the phases of early and late time reheating through imprints on primordial gravitational waves

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