Complex Time and Quantum Coherence: a reading of Wheeler's Delayed‑Choice Experiment (v5)

We propose a geometric interpretation of Wheeler’s delayed-choice experiment based on a complex representation of time T=t−iτ. In this framework, the experimental configuration imposes an internal rotation of angle θ, which modifies the imaginary component of time and therefore quantum coherence, without affecting causal evolution in t. The model shows that the late decision to open or close the interferometer acts solely on the imaginary-time component, altering the quantum phase without requiring retrocausality. The appearance or disappearance of interference fringes thus emerges as a geometric consequence of this internal rotation. This approach provides a coherent mechanism for understanding how a choice made after the photon has passed can still influence the observed interference, and it opens the possibility of experimentally probing temporal correlations of visibility.