Sink and Anti-Sink Entanglement: Missing Antimatter, Dark Energy, and Gravitational-Wave Predictions

We present a conceptual Perspective on the microscopic structure of spacetime near black hole horizons, motivated by the ER=EPR conjecture and semiclassical Hawking radiation. We argue that entangled matter–antimatter pairs created near horizons admit an effective geometric interpretation: matter acts as a local spacetime sink while antimatter acts as a compensating anti-sink, yielding curvature cancellation when the pair remains entangled. This framework provides a unified qualitative account of (i) the apparent absence of free cosmic antimatter, (ii) the emergence of dark energy as a residual, global anti-sink pressure of the quantum vacuum, and (iii) a falsifiable prediction that intense photon environments do not measurably affect gravitational-wave propagation. All claims are formulated conservatively and remain consistent with existing experimental constraints. This manuscript is currently a preprint and has not yet undergone peer review. Feedback is welcome.