Quantum Entanglement, Shared Realization Burden, and No-Signalling Correlations on a Finite-Capacity Substrate

We construct the entanglement branch of the finite-capacity latency–erasure framework and show that quantum nonlocal correlations arise naturally when spatially separated quantum subsystems are realized on one bounded-capacity substrate rather than on an infinitely permissive continuum. In this framework, entanglement is not interpreted as superluminal message transfer and not as a breakdown of causality. It is realized as a shared substrate burden in which correlated subsystems are co-supported by a common patch-level update architecture. Two entangled subsystems therefore do not behave as dynamically independent realizations. They occupy a joint co-realization branch whose maintenance carries a finite correlation cost, a nonzero latency overhead, and a bounded substrate bandwidth. From this structure we derive the central principles of the finite-capacity entanglement sector. Bipartite entangled states are represented as shared realization burden across a nonlocally coordinated patch network. This shared burden produces correlation support without permitting free transmissible signalling, thereby preserving the no-signalling structure of quantum theory while replacing the continuum picture of correlation without substrate cost. We then show that multipartite entanglement amplifies collective realization burden, raises local latency, and drives the substrate toward saturation. The maintenance cost of large entangled assemblies therefore grows rapidly with subsystem number, making long-lived macroscopic entanglement dynamically unstable rather than merely observationally rare. This yields a unified finite-capacity account of two major quantum facts: persistent nonclassical bipartite correlations and the rapid disappearance of deep entanglement in macroscopic systems. The same substrate law that supports nonlocal correlation at small scales also destroys large-scale coherence when collective burden becomes too high. Entanglement and decoherence are therefore not unrelated mysteries. They are opposite regime expressions of one bounded co-realization architecture. This establishes the quantum nonlocality branch of the finite-capacity program and integrates entanglement, bounded correlation cost, no-signalling consistency, and macroscopic decoherence into a single substrate-based framework.