Dynamical Erasure of Pre-Initial Condition Memory in Quantum–Relativistic Cosmology

A central challenge in modern cosmology is explaining why the universe exhibits robust large-scale regularities despite the vast space of physically admissible initial conditions. Conventional approaches often invoke inflationary mechanisms or special entropy assumptions to account for this apparent insensitivity to primordial structure. In this work, we present a controlled computational investigation that deliberately removes such assumptions and instead examines whether radically distinct pre-initial cosmological states converge to identical late-time observable regimes under fully constrained quantum–relativistic dynamics. An ensemble of 512 independent realizations is evolved from heterogeneous initial condition classes spanning extreme anisotropy, vacuum-dominated fluctuations, curvature-dominated geometries, non-Gaussian density seeds, fragmented topologies, and causally disconnected domains. Across all realizations, late-time observables—including large-scale structure statistics, effective dimensionality, vacuum energy signatures, causal network topology, and field correlation spectra—converge to statistically indistinguishable regimes. Explicit diagnostics demonstrate rapid decay of initial-condition memory, vanishing observable divergence, and emergence of a stable, representation-independent dynamical attractor. These results provide strong evidence that large-scale physical structure and effective laws are emergent consequences of constrained non-equilibrium dynamics rather than direct imprints of the universe’s primordial state. The findings support a law-first, history-second view of cosmological explanation and suggest fundamental limits on reconstructing the universe’s origin from present-day observations.