Young’s double slit Experiment using Heralded Single Photons

A. F. Isakovic, Kenneth Evans‐Lutterodt, David Peter Siddons +5 more

C.Z. Tan

Alexander Shaw, Trevor G. Vrckovnik, Billy Thorpe +1 more

This experiment explores the quantum phenomenon known as the Quantum Eraser, using a variation of Young’s Double Slit experiment. Young’s Double Slit experiment demonstrates that light acts as a wave by creating an interference pattern when diffracted through two slits. If one measures which of the two slits the photons pass through, then the interference pattern is replaced by a single bright spot, as would be expected for particle-like behaviour. The “Quantum Eraser” eliminates the measurement on the photons, thereby reintroducing the interference pattern observed in Young’s original experiment. The experiment’s first stage saw Young’s Double Slit experiment recreated and an interference pattern was observed. Upon adding two orthogonally polarized filters, the photon’s path was measured, and the interference pattern was removed. By then adding a third filter which was polarized 45O relative to both other polarisers, the interference pattern was somewhat restored. For each experiment, the heights of the peaks in the interference patterns were compared to each other to examine the quality of the reproduced interference pattern based on the original double slit interference pattern. This comparison gave a quantitative result that demonstrated that the Quantum Eraser was able to restore the interference pattern to within 5 standard errors, thereby exemplifying the effect that changing the measurement conditions affects the final measurement.

Tore Wessel-Berg

C. Siam, A. Hazarika, J. Saikia R. Mahanta G.D. Baruah

In the present work we have discussed the well known topic of simultaneous passing of photon through both the slit of Young double slit experiment.With the help of the example of Newton's sailor in the special theory of relativity we have shown that Feynman's statement in the quantum version of Young's double slit experiment regarding the simultaneous passage of a photon through both the slits simultaneously needs to be qualified.

Dmitri L. Khokhlov