Dimensional Fusion: Unified Origin of Mass, Time, Gravity, and the Cosmos

This preprint proposes a unified theoretical framework in which the observable universe emerges from an eternal one-dimensional energetic substrate through "Dynamension" — an atemporal dimensional dynamics generating colossal energy clouds. The fusion of two clouds breaks symmetry, exciting an elastic hexadimensional manifold with mixed-signature metric (+++---), governed by the free wave equation □₆ψ = 0. Superluminal vibration induced by dimensional friction gives rise to inertial mass as crystallized persistence (m = ℏΩ(θ)/(2c)), gravity as backflow to the negative triad, time as relational counting of interference cycles, and cosmology (expansion, CMB, evolving dark energy with w ≈ -0.95 consistent with DESI DR2). No fundamental particles, Higgs field, or fixed cosmological constant are required. Quarks emerge as angular sub-folds, dark matter as non-radiative residual modes. The structure evolves toward open one-dimensional degradation with energy recycling. Falsifiable predictions include redshift evolution of w, bimodal primordial black hole spectrum, stochastic gravitational-wave background in LISA band, and tiny variations in constants testable by atomic clocks and Euclid/LSST. This framework resolves the cosmological constant problem and unifies micro and macro scales from a single geometric-energetic principle.