The Hubble parameter of the Local Distance Ladder from dynamical dark energy with no free parameters

Our cosmology contains Big Bang relic fluctuations by a loss of time-translation symmetry on a Hubble time scale. The contribution to the vacuum is identified with dynamical dark energy ₚ₀ by an IR coupling ₚ of the bare cosmological constant ₀^-1 consistent with general relativity, where is the Planck constant. Described by the trace of the Schouten tensor J= (1-q) H² derived from a path integral formulation with gauged global phase, the proposed JCDM takes us beyond the CDM limit of frozen J=. The Hubble constant H₀ in JCDM is effectively 6/5 times the Planck value in CDM analysis of the CMB according to H (z) =H₀1+ (6/5) ₌, ₀ ₙ䃕 (ₙ) + _ₑ, ₀Z₆ (z) / (1+z), where Zₙ= (1+z) ⁿ-1 given densities of matter ₌, ₀ and radiation ₑ, ₀. With no free parameters, JCDM hereby agrees with the Local Distance Ladder when satisfying the BAO measured by Planck. On this cosmological background, galaxies possess an essentially C⁰-transition to anomalous dynamics due to reduced inertia below the de Sitter scale of acceleration a₃ₒ=cH, where c is the velocity of light. This is confirmed in SPARC over a 6 tension in CDM galaxy models, pointing to ultra-light CDM of mass mDc²<3 10^-21eV. Sensitivity to this cosmological background explains the JWST 'Impossible galaxies' at cosmic dawn by rapid gravitational collapse. We comment on an outlook on future confrontations with observations by Euclid.