Gravitational Collapse of the Universal Wavefunction: A Self-Observing Universe from Quantum Fluctuation

We propose that the Big Bang was not a singularity but the firstgravitational collapse of the universal wavefunction — a quantum fluctuation in an infinite pre-geometric scalar field. Gravity, emergingfrom energy density via the Schr¨odinger–Newton equation, acts as anobjective observer, triggering wavefunction collapse without externalagents. Time, space, and classical reality arise as byproducts of thisirreversible process.A 1D numerical simulation demonstrates how a small fluctuationevolves into a localized, expanding density peak — a “mini Big Bang”.The model naturally explains:• the origin of time (from collapse sequence),• the smallness of Λ (post-collapse vacuum decay),• and CMB fluctuations via collapse spectrum.This framework unifies quantum measurement, quantum gravity (semiclassically), and cosmology, offering falsifiable predictions for gravitational decoherence experiments and CMB power spectrum anomalies.This is not a “theory of everything” — it is a mechanism for the birthof everything.