>The delayed-choice quantum eraser wasn’t carried out experimentally until 1999, so I think it’s a bit misleading to say this is what makes the double-slit expe

>The delayed-choice quantum eraser wasn’t carried out experimentally until 1999, so I think it’s a bit misleading to say this is what makes the double-slit experiment (first carried out with matter in 1927) so weird. I think Sabine is right, the weirdest thing in the quantum eraser experiment is still the FTL update of the wavefunction. She has a nice video on delayed-choice quantum eraser: https://www.youtube.com/watch?v=RQv5CVELG3U https://www.youtube.com/watch?v=RQv5CVELG3U