Open-Source Coherence Test v1.0 — v5.0 Global Edition

Coherency test v5.0 64-Qubit Superconducting Quantum Processor Blueprint Low-temperature interconnect design enabling all-to-all microwave photon routing between transmon qubits. Flip-chip indium bonding, niobium waveguides, 20 mK operation, S₂₁ >90 %, coherence >50 µs. Standard cleanroom fab, no proprietary tweaks. Detailed build, timeline, safety. Reproducible. Keywords: open-source, siphon tank, scaling, superconductivity, cryocooler, YBCO, resonance ladder, k=50, resonance duality License: CC-BY 4.0 **Results may vary due to build process, materials, wiring, and environmental factors.**