A Geometric Mechanism for Objective Reduction: Temporal Coupling Incompatibility

I propose a geometric mechanism providing the physical basis for gravitationally-induced quantum state reduction. I introduce temporal coupling (τ-coupling), a fundamental parameter κ_τ characterizing how physical systems relate to the temporal dimension. The central contribution is the Temporal Incompatibility Postulate: superpositions involving distinct effective temporal couplings are geometrically unstable and undergo spontaneous reduction. I extend the basic identification κ_τ = m to include gravitational configuration energy, yielding κ_τ^(eff) = m + E_G/c², which recovers Penrose's predictions for spatial superpositions while providing the missing causal mechanism. I explicitly distinguish this approach from standard Penrose OR, identify where predictions coincide and diverge, and propose experimental tests to discriminate between mechanisms. For mass superpositions at the same location, the predictions differ by over 40 orders of magnitude, providing a qualitative discrimination test.