An Attosecond Crossover Test for the Relativistic Temporal Interpretation of Wave–Particle Duality

This paper presents a quantitative proof attempt and experimental test program for the previously published Relativistic Temporal Interpretation (RTI) of wave–particle duality and quantum uncertainty. The earlier RTI paper proposed that wave-like and particle-like manifestations may be separated or organized by an effective relativistic temporal distinguishability scale. The present work does not restate the theory from the beginning; instead, it develops testable consequences of that published interpretation. Published complementarity data are mapped into a temporal coherence form, and controlled electron double-slit diffraction is used to derive a falsifiable attosecond-scale crossover prediction. For the 50–62 nm electron slit-width bracket, the model predicts a robust experimental search window of approximately 470–540 eV. Independent attosecond time-domain double-slit experiments are also discussed as supporting evidence that electron interference, which-way information, and attosecond timing can be experimentally connected. The paper concludes that a dedicated electron energy-scan experiment remains required for decisive confirmation.