Delayed - choice quantum eraser we all know are present affect the future what we do today it's affect the future , but in the quantum world the future affect the past in quantum physics we learn very tiny particles .... according to quantum physics theory Delayed - choice quantum eraser , future affect the past ..... delayed choice quantum eraser theory ? A delayed quantum eraser experiment first performed by YOON-HO KIM and other reported in early 1999 is an elaboration on the quantum eraser experiment that incorporates concept considered in wheeler's delayed - choice experiment . the experiment was designed to investigate peculiar consequence of the well- known double slit experiment in quantum mechanics as well as the consequence of quantum entanglement ..... what does quantum eraser experiment tell us ? when you measure the photons it is finally possible to think its properties classically and the wave function allows one to calculate...