The Granular Cosmic Vacuum: AStructural Truth about Dark Energy and Dark Matter

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.