Which-way identification by an asymmetrical double-slit experiment with monochromatic photons

Recently, a laser beam asymmetrical double-slit experiment was proposed and performed, concerning ontological physical reality in quantum mechanics, under an assumption of single-photon interference. In the present study, by controlling better for saturation effects and upgrading the slit's shape, we succeed in producing new interference samples with acceptable quality. Applying almost the same geometrical set-up, the present experiment makes the which-way identification with higher experimental confidence. In the results, the ontological which-way effect observed in our recent experiment is well reconfirmed without any additional measurement of relative integral intensity.

Automated summary

In this study, a laser beam asymmetrical double-slit experiment was successfully performed, producing new interference samples with acceptable quality by controlling for saturation effects and upgrading the slit's shape. The experiment also made the which-way identification with higher experimental confidence.