The Vacuum Gate — FTL Multiversal Communication and the Statistical Certainty of Planetary Destruction

This paper presents a comprehensive theoretical analysis of the existential risks posed by faster-than-light multiversal bridge communication technology, representing the final and darkest consequence of the compositer theoretical framework initiated in Composite Dimensionality (Jacob, 2013). When FTL bridges connect universe branches with temporal displacement ∆t ≠ 0, incompatible physical constants between branches nucleate vacuum bubbles at the bridge formation point. These bubbles trigger event horizon formation through the Empty Horizon Black Hole mechanism. The initial black hole mass scales as MBH (∆t) = K|∆t|¹. 4, where K ≈ 7. 8 × 10⁹ kg s⁻¹·⁴, ranging from negligibly small for local consumer communications to asteroid-mass for large-separation connections. The paper introduces the Vacuum Gate Principle: the FTL device does not supply the energy for the catastrophic events it triggers. It is a gate, not a source. No engineering modification can limit the energy of the events it unleashes, because that energy comes entirely from the vacuum differential between connected universes. The catastrophe is unidirectional — the higher vacuum energy universe always suffers — and strictly participatory. Universes without active FTL devices are completely immune. The paper further introduces the Cascade of Oblivion: at commercial deployment scales of 10¹² or more daily connection attempts, the combined multiverse-scale consequences cannot be expressed as a number, bounded, estimated, or compared to any known quantity. Mathematics fails completely and without approximation. The paper concludes with absolute policy recommendations: no Earth-based or near-Earth experimentation; research permitted only at d ≫ 2 AU with informed-sacrifice protocols; consumer deployment represents civilisational suicide. Keywords: faster-than-light communication, vacuum decay, black hole formation, compositer theory, existential risk, Great Filter, Cascade of Oblivion, Empty Horizon Black Holes, vacuum gate principle, multiversal bridge technology, planetary destruction, statistical certainty