Cosmological Redshift and the Geometry of Causal Expansion in the Computed Universe

This paper presents a new explanation of cosmological redshift rooted in the Computed Universe (CU) model — a framework in which all physical phenomena arise from surface-propagated causal updates over a voxelated spacetime substrate. In contrast to traditional interpretations that treat redshift as a consequence of relative velocity or metric expansion, the CU model describes redshift as a direct result of delayed frequency updates due to curvature-induced compute saturation.<br>Key insights include:<br>A causal update interpretation of photon frequency shift, grounded in delayed tick propagation and surface update sparsity.Redshift as a measurable manifestation of propagation lag, rather than geometric stretching of space.Reconciliation of redshift with curvature, mass-energy distribution, and gravitational time dilation.A new view of the cosmological redshift that connects redshift magnitude to local and distributed causal topology, rather than velocity alone.<br><br>This reformulation positions redshift as a core diagnostic tool in causal geometry, offering testable distinctions between expansion-based models and the CU model’s substrate-based explanation. The work complements earlier CU papers on energy identity and curvature saturation, and builds toward a unified causal basis for cosmological observation.