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Primordial backgrounds of relic gravitons

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arxiv 1912.07065 v2 pith:P5IZWKWH submitted 2019-12-15 astro-ph.CO gr-qchep-ph

Massimo Giovannini This is my paper
classification astro-ph.COgr-qchep-ph
keywords gravitonsrelicbackgroundsbandanisotropiesarraysaspectsastrophysics
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The diffuse backgrounds of relic gravitons with frequencies ranging between the aHz band and the GHz region encode the ultimate information on the primeval evolution of the plasma and on the underlying theory of gravity well before the electroweak epoch. While the temperature and polarization anisotropies of the microwave background radiation probe the low-frequency tail of the graviton spectra, during the next score year the pulsar timing arrays and the wide-band interferometers (both terrestrial and hopefully space-borne) will explore a much larger frequency window encompassing the nHz domain and the audio band. The salient theoretical aspects of the relic gravitons are reviewed in a cross-disciplinary perspective touching upon various unsettled questions of particle physics, cosmology and astrophysics.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Graviton Production from Inflaton Condensate: Boltzmann vs Bogoliubov

    hep-ph 2026-04 unverdicted novelty 6.0 of 10

    For quadratic inflaton potentials Boltzmann and Bogoliubov spectra agree at short wavelengths, but for steeper potentials non-adiabatic transition effects captured only by Bogoliubov are sizable across a broad momentum range.

  2. Gravitational Photon Polarization Twist to Probe the Early Universe and the Galactic Center

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A long-baseline laser pulse whose polarization is twisted by gravitational waves could detect galactic-center pulsar and early-universe gravitational wave backgrounds.

  3. High-Frequency Gravitational Waves on BREAD

    hep-ph 2025-05 conditional novelty 6.0 of 10

    BREAD with single photon detectors could detect high-frequency gravitational waves at 0.05 to 200 THz, with projected strains as low as 1e-25 at 200 THz.

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