Revelation method of unmeasured phenomenon in Wheeler's "Delayed-Choice" Double-Slit Experiment

Abstract Wheeler proposed the "Delayed-Choice" Double-Slit Experiment. Perhaps the quantum delayed eraser experiments revealed Wheeler's unmeasurable phenomenon. However, all quantum delayed eraser experiments involve non-locality between entangled photon pairs, causing the timing relationship between events on the idler path and events on the signal path to not necessarily represent the timing relationship between the correspond events on the signal path. In the quantum delayed eraser experiments, the time distinguishing the path passing through the double-slit on the signal path is when they pass through the slits. Therefore, the quantum delayed eraser experiments do not adhere to the condition in Wheeler's "Delayed-Choice" Double-Slit Experiment, which need the distinction of the photons passing through the double-slit is done after the formation of the fringe pattern. The results of the quantum delayed eraser experiments do not exhibit the unmeasured phenomenon of Wheeler's "Delayed-Choice" Double-Slit Experiment. This paper proposes a method that eliminates the non-locality effects of entangled photons without using entangled photon pairs. By dividing the route of photons passing through the double-slit into two routes and verifying the fringe pattern based on the number of photons on the two routes, Wheeler's notion of an unmeasured phenomenon becomes measurable, thus providing a revelation method of the unmeasured phenomenon in Wheeler's "Delayed-Choice" Double-Slit Experiment.