Simultaneous measurement of wave and particle properties using modified Young's double-slit experiment

The principle of complementarity is the foundation of quantum mechanics; its correctness has been verified by several studies. At present, the Englert-Greenberger duality relation is used for quantitative evaluations. We fabricated a new double slit experimental apparatus capable of simultaneously measuring the visibility and path-distinguishability, and measured the wave and particle properties. We thus obtained results in disagreement with the principle of complementarity