Observational Space Unveils Cosmic Expansion's Role in the Hubble Tension (2506.16669v1)

Abstract: We introduce a geometric embedding method that directly constrains $H_0$ by exploiting the exact kinematic relation $\dot{z} = H_0(1+z) - H(z)$ in a unified observational framework. This approach reconstructs expansion history without requiring specific cosmological models, incorporating both existing Cosmic Chronometer data and forecasted Sandage-Loeb measurements. Through mathematical embedding of observational constraints, we achieve $\sim 1.6\%$ precision in $H_0$ determination, matching current Cepheid distance ladder accuracy while maintaining model independence. The method demonstrates how fundamental kinematic constraints enable precision cosmology, providing a promising pathway to address the Hubble tension as future redshift drift observations become available.