This paper establishes that a single scalar invariant µ = ½Tr (Q⊥R) simultaneously determines phase asymmetry, rotational defect, and interference structure in the reduced Q5 transport system. The central result is that µ links phase asymmetry, rotational defect, and interference source as the unique rotational readout coefficient of the reduced operator sector. The amplitude-square observable form \ |√P₁ + e^iφ√P₂|² from the interference structure under conditional uniqueness assumptions rather than being assumed. The solid core establishes: \ µ ∝ Im (PQ̄) = |P||Q|sin (ΔΩ) \ ; µ is the unique antisymmetric rotational coefficient on the transverse phase plane P⊥; channel and operator definitions of µ coincide under the common-reduction assumption; the interference term µ⟨R⟩ is the sole phase-sensitive contribution to observables; and amplitude-square structure follows from the interference form. Conditional extensions (barrier holonomy, entangling power, effective generator, and emergent time) are explicitly separated from the solid core and stated with their open derivation dependencies. The paper demonstrates that interference and amplitude structure share a single origin in µ, and that the amplitude-square form is derived rather than assumed.
Craig Edwin Holdway (Sat,) studied this question.