Dual-Domain Cosmology: Ontological Foundation for General Relativity and Quantum Field Theory

For decades, General Relativity (GR) and Quantum Field Theory (QFT) have remained conceptually difficult to reconcile, with one describing gravity as geometry and the other modeling matter as quantum excitations. This work proposes an ontological framework in which spacetime is not fundamental but emerges from a deeper non-spatiotemporal quantum domain (QD). In this view, quantum entanglement is taken as primary, residing in a nonlocal and atemporal QD, while the observable Spacetime Domain (SD) consists of events that arise when QD relations are transduced across a QD–SD interface. Here, transduction refers to an ontological mapping between domains rather than a dynamical process within spacetime. The rate of this mapping is assumed to be bounded by a fundamental limit, termed the Maximum Geometric Transduction Speed (MGTS), which provides an interpretation of the invariant causal speed observed as the speed of light in vacuum. Within this framework, several physical phenomena—such as quantum measurement, relativistic structure, and cosmological effects—may be interpreted as manifestations of underlying entanglement structure. GR and QFT are thus viewed as effective descriptions of the SD rather than fundamental theories. The key contribution is the introduction of transduction as a domain-bridging relation, together with a global rate constraint, as a unifying ontological principle. This proposal is intended as a conceptual foundation rather than a new formal theory. Keywords: General relativity; Quantum field theory; Quantum entanglement; Dual‑domain ontology; Quantum gravity; Cosmology.