A Dual-Domain Cosmology: Entropy, Time, and the Structure of Spacetime

Fundamental physics faces a constellation of puzzles: dark energy, the vacuum catastrophe, the origin of relativistic invariance, the measurement problem, and quantum gravity. This essay explores a unifying interpretive framework in which reality is modeled as two interacting domains: a timeless, coherent Quantum Domain (QD) of pure potentiality, and an emergent, geometric Spacetime Domain (SD) of actualized events. Their interface is governed by a Maximum Geometric Transduction Speed (MGTS, c)—interpreted here as the maximal rate at which coherence potential is rendered into spacetime actuality. Within this picture, several long-standing problems are reframed. Cosmic acceleration may be understood as arising from an increasing coherence deficit between the cooling SD and the coherence-saturated QD, experienced as transduction pressure. The invariance of c emerges naturally when the observer is understood as a transduced system rather than an external vantage point whose measurements are constrained by the MGTS. The vacuum catastrophe is reinterpreted by recognizing QFT's vacuum energy as a measure of the QD's coherence potential rather than the energy of empty space. The measurement problem and quantum non-locality find a new ontological home when superposition is located in the atemporal QD and collapse in stochastic transduction events at the interface. The framework does not modify the empirical predictions of general relativity or quantum field theory; it offers only an ontological reinterpretation aimed at unifying these domains within a single conceptual picture. It is presented as an essay—a speculative invitation to further inquiry, not a formalized theory. Keywords: Emergent spacetime; Dark energy; Quantum gravity; Relativity; Lorentz invariance; Quantum foundations; Cosmological constant problem; Measurement problem; Entanglement entropy; Dual-domain cosmology; Transduction pressure; MGTS