A glitch in gravity: cosmic Lorentz-violation from fiery Big Bang to glacial heat death
arXiv:2412.09568 · doi:10.1007/978-3-031-90186-7_35
Abstract
One regime where we might see departures from general relativity is at the largest accessible scales, with a natural choice in cosmology being the cosmological horizon (or Hubble) scale. We investigate a single-parameter extension to the standard cosmological model with a different strength of gravity above and below this scale -- a "cosmic glitch" in gravity. Cosmic microwave background observations, and Baryonic Acoustic Oscillations (including the recent DESI Y1) favour weaker superhorizon gravity, at nearly a percent (or 2 level), easing both the Hubble and clustering tensions with other cosmological data. This compounds evidence for an even stronger glitch during Big Bang nucleosynthesis (from helium abundance observations), suggesting that symmetries of general relativity are maximally violated at the Big Bang, but gradually recovered as we approach the present-day cosmological de Sitter scale, associated with the observed dark energy.
To be published in Astrophysics and Space Science Proceedings: "The Relativistic Universe: From Classical to Quantum, Proceedings of the International Symposium on Recent Developments in Relativistic Astrophysics", Gangtok, December 11-13, 2023: to felicitate Prof. Banibrata Mukhopadhyay on his 50th Birth Anniversary", Editors: S Ghosh & A R Rao, Springer Nature; Reviewing & extending 2311.03028
References in corpus (20)
- Quantum Gravity at a Lifshitz Point
- A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
- Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
- The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
- DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
- The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- PolyChord: nested sampling for cosmology
- Planck intermediate results. LVII. Joint Planck LFI and HFI data processing
- DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars
- Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy
- Cosmological parameters derived from the final (PR4) Planck data release
- Cuscuton Cosmology: Dark Energy meets Modified Gravity
- Parametrized Post-Friedmann Signatures of Acceleration in the CMB
- Cuscuton and low energy limit of Horava-Lifshitz gravity
- EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension
- Cosmology with the Wide-Field Infrared Survey Telescope -- Synergies with the Rubin Observatory Legacy Survey of Space and Time
- More on "Little Lambda" in Hořava-Lifshitz Gravity
- Does Planck mass run on the cosmological horizon scale?
- The role of in CMB anisotropy measurements