2024/07/25 by Wei-Ning Deng, Will Handley, Deng, Wei-Ning +1
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Geophysics and Gravity Measurements
paper · pdf · doi:10.48550/arxiv.2407.18225
openalex publication_date 2024/07/25 · openalex created_date 2024/09/11 · openalex updated_date 2026/07/28
Boyle and Turok's CPT-symmetric universe model posits that the universe was symmetric at the Big Bang, addressing numerous problems in both cosmology and the Standard Model of particle physics. We extend this model by incorporating the symmetric conditions at the end of the Universe, which impose constraints on the allowed perturbation modes. These constrained modes conflict with the integer wave vectors required by the global spatial geometry in a closed universe. To resolve this conflict, only specific values of curvature are permissible, and in particular the curvature density is constrained to be ΩK ∈ \-0.014, -0.009, -0.003, …\, consistent with Planck observations.