Resolving the Hubble Tension via Viscoelastic Relaxation: A Non-Equilibrium Solution to the ΛCDM Crisis

Abstract: The persisting 4σ to 6σ discrepancy between early-universe estimates of the Hubble Constant (Planck/CMB: H₀ ≈ 67.4 km/s/Mpc) and late-universe local measurements (SH0ES/SNIa: H₀ ≈ 73.0 km/s/Mpc) suggests a fundamental flaw in the standard ΛCDM concordance model. Current attempts to resolve this "Hubble Tension" typically invoke Early Dark Energy (EDE) or exotic particle physics. This paper proposes a mechanical solution derived from the Deus Cosmological Model (DCM), which posits that the spacetime vacuum is not a Perfect Fluid, but a Viscoelastic Kelvin-Voigt Solid possessing non-zero Bulk Viscosity (ζ).