LAUSR

The recent state-of-the-art double-slit experiments with single electrons and single photons seem to emphasize a contradictable dilemma concerning the ontological physical reality in quantum physics. Because of the importance of this problem, we propose and perform another modified laser-beam asymmetrical double-slit experiment with a constraint of single-photon interference. In the results, a Feynman condition with a mobile closing mask allows assessing the complementary contributions of photons passing through one or another slit. Under the assumption of applicable self-interference, a ‘which-way’ phenomenon is observed quantitatively in the vicinity of the main minima with low-intense interference fringes, demonstrating a possible solution to this problem. The result would encourage similar asymmetrical double-slit experiments with truly single photons or single electrons for consistent and direct observation of the wave-particle duality.