QCMT‑SC v1.0: A Quantum Coherence Mass Test Using Superconducting Phase Transitions

QCMT‑SC v1.0 presents a complete, experimentally testable protocol for measuring whether macroscopic quantum coherence contributes to gravitational mass. The experiment compares the gravitational mass of a high‑purity niobium sample in two coherence states: - Normal metallic state (ICS = 0) - Superconducting state (ICS ≈ 1) Using precision gravimetry under controlled cryogenic conditions, the protocol isolates coherence‑dependent mass contributions while suppressing thermal, magnetic, buoyancy, and mechanical systematics. The document includes: - theoretical background (CCEC framework and Informational Coherence State), - full sample specification, - cryogenic and magnetic shielding requirements, - gravimeter configuration, - step‑by‑step measurement procedure, - reversibility checks, - complete error budget, - expected signal model, - statistical analysis framework, - systematic error mitigation strategies, - and two appendices (error budget table and ICS derivation). The experiment yields a measurable quantity: \[ \Delta m{\text{coh}} = m1 - m_0 \] which constrains the information–mass coupling parameter: \[ \alpha{IM} < \frac{\sigma{\text{total}}}{m_{\text{sample}}} \] A null result sets the first experimental upper bound on coherence‑dependent mass effects. A positive result would indicate new physics linking information, quantum coherence, and gravitation. QCMT‑SC v1.0 is designed to be fully reproducible and implementable with existing cryogenic and gravimetric technology, enabling independent laboratories to directly test the CCEC prediction.