Can reality be attuned after events have happened? That is the upsetting suggestion of the delayed choice quantum eraser experiment.
The astonishing results of the single particle double slit experiment implicit some surprising things about the reality’s nature. In the following program of Space Time PBS Digital Studio, the author talks about an additional and probably even stranger version of this experiment, whose outcomes make us to think again itself the nature of causality. In the program, a brief description of the first experiment is given, without which the viewers can’t make a lot of sense to understand the second one.