A Geometric Alternative to Dark Energy

Cosmic acceleration is usually explained by dark energy or a cosmological constant. Here we propose a geometric alternative in which acceleration is regulated directly by curvature, and curvature itself is a function of declining density. This law—expressed simply as acceleration follows curvature, and curvature follows density—requires no exotic energy. When evaluated numerically, however, it predicts an early expansion rate faster than observed. To moderate this, a new gravity-tunneling term is introduced: part of the gravitational curvature leaks into an adjoining dimension, reducing the effective curvature within three-space and aligning predicted expansion with measured cosmic acceleration. If gravity can tunnel, mass, energy, and quantum states may tunnel as well. Such leakage would raise the stochastic floor that appears as quantum noise and plasma turbulence. Understanding and compensating for tunneling could suppress those fluctuations, stabilizing plasmas and extending quantum coherence—advances essential to both fusion power and quantum computing.