Boundary Engineering for Decoherence Reduction - A BICTNA Model for Quantum Devices

Decoherence remains the principal scalability bottleneck of quantum devices, yet it is still predominantly treated as an environmental or thermal phenomenon. This paper proposes that a significant component of decoherence arises from boundary-induced structural mismatches rather than from noise alone. We introduce a Boundary-Induced Collapse (BIC) control framework derived from the Theorem of Axiomatic Necessity (TNA), formalizing how geometric, electromagnetic, and informational boundary conditions generate discrete decoherence thresholds. By engineering boundary coherence rather than increasing cryogenic or shielding resources, the model predicts measurable reductions in effective decoherence rates without altering qubit material composition. The paper presents a falsifiable experimental protocol, analytical stability conditions, and a device-agnostic control strategy applicable to superconducting, trapped-ion, and photonic quantum architectures. Failure modes and null-result criteria are explicitly defined to ensure empirical testability. This work reframes decoherence mitigation as a boundary engineering problem and provides an operational bridge between ontological measurement theory and practical quantum device optimization.