QEM-4: Topological Domain-Wall and Stationary Interference Texture in Multi-Body Entanglement

The QEM-4 paper extends the Quantum Entanglement Mechanics (QEM) framework by introducing the concept of topological domain-walls emerging from mirror-coupled entanglement layers. These domain-walls act as internal interfaces where sequential flip-waves form stationary interference textures, analogous to internal double-slit patterns within the entanglement lattice. Analytical φ⁴-type solutions and critical-layer scaling relations are derived, providing testable predictions in coupled-qubit, ion-chain, and optical-lattice systems.