Silicate Pathway to Durable Quantum Hosts

This design paper presents a comprehensive, provenance-first framework establishing magnesium-rich crystalline silicates (forsterite–enstatite) as a foundational host class for multi-level quantum information architectures. Moving beyond secondary industrial silicon copies, the work bridges deep planetary history—connecting primordial nebular condensation, porous aggregation, and ultramafic crust formation to a zircon-anchored Cool Early Earth—with modern laboratory synthesis routes, including Anovitz nano-forsterite and Gao's architected crystalline mesoporous Mg2SiO4. Structured around a rigorous four-pillar framework (Provenance, Host, Encoding, and Time-as-phase), this deposit supplies independent research laboratories with the necessary evaluation tools and decision logic: Locked Host-Evaluation Module: A definitive three-part protocol for Gao et al.’s crystalline mesoporous Mg2SiO4, detailing foundational rationales, multi-frequency EPR/NMR characterization pipelines for transition-metal impurities and nuclear spin baths, and fallback structural/photonic scaffolding pathways. Executable Day-1 Laboratory Session Pack: Actionable measurement protocols for independent groups—defining sample states (S0 as-synthesized vs. S1 carbon-removed), wide-field and high-resolution EPR survey sequences, diagnostic tables for impurity identification, and expected Fe3+ fingerprint series (referencing Naik and Chatelain models). Numerical Falsification Gates (G1–G5): Explicit quantitative boundaries governing aggregate paramagnetic impurity density (N_para <= 10^15 - 10^16 cm^-3) and native transverse relaxation times (T_2^* >= 10–100 microseconds) to determine whether a specimen functions as a primary native spin host or a durable photonic/phononic scaffold. Language Locks and Scope Boundaries: Strict definitions clarifying that higher Hilbert dimensions designate qudit dimension d (rather than extra spacetime dimensions) and that internal dynamical clocks represent relative phase evolution. Near-term encodings default to hybrid architectures (Regime C) until native defect/nuclear centers (Regimes A/B) are empirically demonstrated. Intended Audience: Experimental groups and research facilities equipped with EPR, NMR, ENDOR, and advanced materials synthesis capacity.