A Two-Channel Model of Quantum Decoherence with Passive Coherence Revival: Spectral-Gap Dynamics with Falsifiable Revival Threshold

Two Theorems (Norm Conservation at zero coupling; Revival Threshold kappa*rhoₑnv > Gamma) plus two Predictions (P1: monotonic revival amplitude in coupling; P2 KILL SHOT: revival delay tauᵣ ~ 1/kappa independent of bath spectral density). The two-channel structure with spectral-gap field Delta (x) governs the competition between projection pressure and environmental coupling. The bath-independent revival timescale is the discriminating prediction distinguishing the framework from any standard decoherence model. Inherits from Paper 0 (axioms A3, A4, A6) ; reframed physics-first for Physical Review A submission after Entropy desk-reject.