The Controlled Phase Shifts of Photons in the Double-Slit Experiment with the Delayed-Choice Quantum Eraser

The delayed-choice quantum eraser (1999 arXiv/2000 PRL) became a signature of modern quantum optics because it shifted attention from a single-screen pattern to the structure of conditional statistics. Its central lesson is operational: interference can be absent in unconditional (singles) counts while reappearing in coincidenceconditioned sub-ensembles, often as complementary fringe and anti-fringe patterns whose sum removes modulation. This architecture transformed complementarity from a slogan into an experimental discipline: reporting marginals and conditionals, making information flow explicit, and designing measurements that separate local statistics from correlation-based structure. This presented new model is based on the oscillating electrical fields E of signal and idler photons – the “white” mode with E2 = 1, the “grey” mode with E2 = 0.5, and the “black” mode with E2 = 0 have been oscillating at the femtosecond time scale. Both the signal and idler photons with their oscillating “color” modes interact with the optical elements on the optical table at the picosecond time scale. The elements on the optical table are arranged in order to measure the delayed-choice quantum eraser within the nanosecond time scale. This proposed “classical” scenario takes into account all sub-ensembles with “white”, “grey”, and “black” clicks at all detectors. It seems that we should experimentally count all of these sub-ensembles and not to delete them from our statistics. The “classical” Nature might surprise us with some unexpected results.

Keywords: Classical Instructions for Photons, Delayed-Choice Quantum Eraser, Interference of Two SubEnsembles of Photons, “Riddle-Like” Discussions.