Paradox Constraining Time Causal Structures: Retrocausal Consistency in Quantum Entanglement

We propose that quantum entanglement, Einstein–Rosen bridges, and post-selected closed timelike curves are interconnected manifestations of a unified causal-consistency mechanism in quantum gravity. In this framework—Paradox-Constraining Time-Causal Structures (PCTCS)—entanglement supplies retrocausal boundary constraints, ER bridges provide geometric connectivity, and P-CTCs eliminate paradoxical histories via post-selection. This model preserves causality without requiring faster-than-light signaling and offers testable predictions in entangled photon experiments and quantum-computer simulations.