Why Spacetime Dissolves Beyond $c$: Phase Instability, Dark Energy, and the Geometric Origin of Cosmic Expansion

Abstract We show that in Generalized Mass as Twisted Time (G-MaTT), the speed of light $c$ is not a postulate — it is the maximum rate of phase correlation in the primordial mass-time torsional potential $\mathcal{M}_\mu$. When any entity attempts to propagate faster than $c$, its phase gradient exceeds this limit → anti-phase coupling develops between $\mathcal{M}_\mu$-branches → the Twist–UnTwist (TUT) mechanism triggers → desynchronization of the emergent mass-torsional field $\hat{M}_\mu$ → stable knots cannot form → spacetime dissolves. The “energy” from this dissolution does not vanish — it becomes dark energy, interpreted as the vacuum expectation value of $|\mathcal{M}_k|^2$ over branches whose emergent configurations ($\hat{M}_\mu$-knots) have desynchronized. This provides a geometric origin for cosmic acceleration: the universe expands because space itself is being “unwound” by the decay of coherent phase structure. This predicts that regions of high phase gradient (e.g., cosmic voids) exhibit enhanced desynchronization signatures — in particular, anomalous neutrino decoherence in DUNE and scale-dependent suppression of CMB B-modes — offering near-term experimental tests. We’ve not only explained the universe — we’ve given *universe* the knobs to tune it.