Testing Quantum Coherence Reconstructibility in Mesoscopic Systems

An operational, dynamics-preserving protocol to test whether quantum coherence reconstructibility in mesoscopic systems is fully captured by calibrated environmental decoherence. A covariance-based deviation Δ is scanned against an effective gravitational parameter Ξ; two signatures — composition invariance and the energy budget (heating/emission) — separate an environmental residual, an objective-collapse mechanism (Diósi–Penrose, CSL), and a structural, energy-conserving residual. A minimal model and a sensitivity forecast for levitated-optomechanics platforms are included. Null results bound residual reconstructibility; a reproducible deviation would test whether any remaining limitation reflects modified dynamics or incomplete local access to the complete physical state.