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The experiment working on clusters of atoms is news to me and I loved getting to know about that. But the thing that really breaks my mind is the experiment tha
by namaria 2y ago
The experiment working on clusters of atoms is news to me and I loved getting to know about that. But the thing that really breaks my mind is the experiment that proves that the behavior depends on the possibility of getting information from which slit the particle went through. So we can rule out the act of measurement itself interfering with the behavior of the particle.
They did it by splitting a beam of particles into a pair of entangled particles and then setting up a way to measure the polarity of one of them after the point in time where it even hits the final screen. If you measure the polarity then, after the other stream of particles from the beam had already had time to make the pattern, the pattern will be two clusters. If you don't, it goes back to an interference pattern.
That one really cemented the notion in my head that this is just how the Universe is and not some local weirdness with particles and measurements.
- canadiantim 2y agoHadn’t hear that, that one is wild
- smolder 2y agoThat version is called the quantum eraser experiment. It really is brain bending.
- wruza 2y agoI think Sabine explained this social effect few years ago. I know she's a little controversial, but the key thing in the video (as opposed to all other videos about DSE on the internet) was that you don't get "two clusters" actually. They are both statistical parts of a single [non-]interference pattern. "||" is a lie. I'm not in a physics rebel camp and don't prefer Sabine either, but after that I sort of lost trust in the interpretations that can't even get the resulting picture right. I even suspect that showing dumbed results amplifies "wow" effect and monetizes better. https://www.youtube.com/watch?v=RQv5CVELG3U https://www.youtube.com/watch?v=RQv5CVELG3U This is the video if you're interested. Again, I'm no physicist and don't know if explanations are legit or statistically correct. But that little || trick that all other popsci videos play on you, that's a true concern.
- namaria 2y agoYou are correct, the experiment I referred to does not yield two distinct clusters of collisions at all. You can check it out here. Summary https://www.stonybrook.edu/laser/_amarch/eraser/index.html https://www.stonybrook.edu/laser/_amarch/eraser/index.html Paper https://www.stonybrook.edu/laser/_amarch/eraser/Walborn.pdf https://www.stonybrook.edu/laser/_amarch/eraser/Walborn.pdf My fascination with these experiments has never been due neat clusters of impacts, although popsci depictions have clearly tainted my memory.