Brane Universe Expansion Dynamics and Bulk Mass Transport Effect of Regular Black Holes in 5D dS Bulk Spacetime with Quantitative Tests

# Brane Universe Expansion Dynamics and Bulk Mass Transport Effect of Regular Black Holes in 5D dS Bulk Spacetime with Quantitative Tests## Author: Honglin Dong### Core OverviewThis paper constructs a self-consistent nested brane cosmology model to address the core puzzles of the ΛCDM standard cosmological model, including the nature of dark energy, the singularity of black holes in general relativity, and the high-redshift observational tension from JWST observations. The model assumes the observable universe is a 3+1 dimensional D3 brane embedded in a 5-dimensional de Sitter (dS) bulk spacetime, where the cosmic expansion is driven by the accretion and phase transition of dense bulk primitives by the brane, providing a geometric and physical interpretation of dark energy. ### Key Content- The mathematical framework is established based on the Israel junction conditions of general relativity and quantum tunneling theory, with the Hayward regular black hole solution adopted to avoid spacetime singularities.- The model has passed three critical observational constraint tests: Big Bang Nucleosynthesis (BBN) compatibility, gravitational wave velocity consistency, and solar system local gravity tests.- 4 unique quantitatively testable observational predictions are proposed, including abnormal quiescent black hole mass loss rate, higher-order harmonics of gravitational wave ringdown, high-redshift Hubble parameter deviation, and annual modulation noise of orbital particle trajectory.- Numerical simulations show the model is compatible with ΛCDM in the low-redshift region and alleviates the JWST high-redshift tension in the high-redshift region, with strict falsifiability and experimental implementation potential. ### KeywordsBrane Cosmology; dS Bulk Spacetime; Regular Black Hole; Bulk Mass Transport; Dark Energy; Gravitational Wave