TRIDENT-Z0 Diagnostic Framework: Conventional BCS Superconductivity as an Intrinsic Macroscopic Quantum Coherence System: PHYS-BCS-001.v1

This technical note applies the TRIDENT-Z0 diagnostic framework to conventional phonon-mediated BCS superconductivity as an intrinsic macroscopic quantum coherence system. Below a critical temperature Tc, certain metals exhibit zero DC resistance, Meissner flux expulsion, and long-range phase coherence arising from Cooper pairing. The superconducting state is characterized by a non-zero complex order parameter psi and an energy gap Delta. Scope boundary: This evaluation is restricted to conventional weak-coupling BCS superconductors. Excluded are Bose–Einstein condensation, unconventional high-Tc materials, strong-coupling Eliashberg corrections, non-phonon pairing mechanisms, and zero-temperature quantum…