The Granular Cosmic Vacuum: A Complete Structural Picture of the Universe

The Granular Cosmic Vacuum (GCV) proposes that what is usually called "empty intergalactic space" is in fact a granular, string–membrane structure. The smooth Einsteinian vacuum is replaced by a lattice of microscopic white holes (MWs), each stabilized by three contracted temporal strings. In this framework, dark energy is not a mysterious fluid nor a quantum vacuum energy, but the geometric tension of a closed temporal string extended over cosmological scales. Dark matter is not made of unknown particles either: it arises from the pressure of closed spatial membranes located in galactic halos. We present a structural model in which the effective dark–energy density is obtained from a damped Planck–scale tension, while the dark–matter phenomenology is generated by membrane pressure without any particle component. We derive an additional damping factor for high–energy gamma rays crossing the granular lattice and a tiny, distance–dependent correction to the Casimir force at 100nm–1μm. Both predictions are quantitatively formulated and can be tested with existing and upcoming gamma–ray telescopes and ultra–precise Casimir experiments. In this sense, the GCV provides a structural truth about dark energy and dark matter as emergent effects of the cosmic string–membrane vacuum, and it offers a falsifiable, particle–free alternative to ΛCDM