A delayed choice quantum eraser experiment
Youngbin Kim, S.P. Kulik, M. O. Scully, Y. H. Shih · 2003
We have realized a quantum eraser experiment in which the results demonstrate the possibility of observing both particle-like and wave-like behavior of a light quantum via quantum entanglement. The which-path or both-path information of a quantum can be erased or marked by its entangled twin even after the registration of the quantum.