The Big Bang as a Phase Transition: A Primordial Temporal Field as the Origin of Gravity, Matter, and Dark Energy

A companion paper [1] established that physical process rates decrease monotonically with cosmic time as R(t) ∝ a(t₀)/a(t), while the proper time interval per physical event increases as T(t) ∝ a(t). This paper proposes a causal mechanism: a primordial temporal field Φ_τ that existed in a pre-condensed state prior to the Big Bang and has been condensing into the gravitational field, matter, and gauge fields of the Standard Model ever since. The Big Bang is identified with the onset of this condensation — a symmetry-breaking phase transition analogous to the Higgs mechanism. Residual uncondensed energy density of Φ_τ is proposed as a natural candidate for the cosmological constant Λ, offering a resolution to the cosmological constant problem through a slow-roll equation of state w ≈ −1 + ε that departs measurably from w = −1. The framework unifies three otherwise unrelated phenomena — the origin of the universe (onset of condensation), the thermodynamic arrow of time and monotonically increasing proper time rate (the direction and dynamics of Φ_τ condensation), and the observed cosmic acceleration (residual Φ_τ energy) — under a single mechanism, and it generates four testable predictions accessible to near-term observational programs including DESI, the Vera Rubin Observatory, and precision quantum coherence experiments.