Comments by "Lepi Doptera" (@lepidoptera9337) on "The Delayed Choice Quantum Eraser, Debunked" video.

  1. First of all, none of this is for the unsuspecting masses. It's for professionals. Secondly, DCQE experiment are NOT meant to be time machines. They were meant to illuminate "reality" aspects of quantum mechanics. As such they basically just confirm what we have already known about QM since 1927: outcomes are NOT compatible with classical objects with classical state that are moving along classical paths. That some people were misrepresenting the facts about these experiments to make a quick buck with trolling on the internet and that the YouTube algorithm is helping them to do that is a problem YouTube has to deal with. It's not a problem of physics proper.
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  2. Wheeler had a few serious misconceptions about quantum mechanics. He was a great relativist, though, except when it came to understanding that quantum mechanics is a direct consequence of relativity. He had that in common with Einstein, it seems. It's a bit of a professional blindness. Having said that, observationally "the past" is all of that which has left a permanent record. More generally, "reality" is that which leaves a permanent record. This is a very important principle that one has to learn to embrace, especially when dealing with quantum mechanics.
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  3.  @KenMac-ui2vb  A big name in theoretical physics would be Edward Witten. You won't see him around here. He doesn't give a frell. Sean MWI Carroll, Sabine Trollenfelder etc. are completely irrelevant "personalities" in the field of physics.
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  4.  @Neohedra  Sean Carroll is preaching, nay evangelizing MWI. Sorry to say, but that makes him a total nutcase. That doesn't mean he can't do math. I am sure he can, but physics is more than just math. It requires you to know what the math means. Sean Carroll obviously does not. With regards to textbooks on quantum mechanics... the overwhelming majority of current texts on quantum mechanics are explaining it wrong. The math is all correct (maybe with exception of one little thing and the usual typo/honest mistake), but if you think that you can learn "what quantum mechanic is and means" from undergrad textbooks about quantum mechanics, then you are in for a rude awakening. Almost every text out there teaches you the how but not the why. That's what they mean by "shut up and calculate". It's a perfectly fine strategy for creating undergrads who will never have to understand fundamental issues, of course, but it's NOT fine if that leads to a physicist telling the public that the world keeps splitting at every corner. It isn't. It's much, much more simple than that. Also extremely boring.
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  5.  @aliensconfirmed3498  Dude, you weren't paying any attention in your special relativity class. Oh, wait, you never took a special relativity class. ;-)
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  6. Why would you trust Sabine at all? She is a bullshitter. ;-)
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  7.  @professormarvel4229 There are no particles in this experiment. There are only people who aren't paying attention in high school when we define for them that "A quantum is a small amount of energy.". It is amazing that this is basically 100% of mankind.
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  8.  @professormarvel4229  Physics is not what's good enough for her. Physics is what describes nature correctly. The word "particle" does not and that's why both of you are eternally confused about the most trivial physics. ;-)
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  9.  @maxmax9050  What is strange to most people is a false explanation. If you go into the lab and you start doing actual quantum measurements then you will be bored out of your mind because absolutely nothing strange is happening at all. And if you want to summarize quantum mechanics theoretically, that's even easier: "Quantum mechanics is the unitary representation theory of the Poincare group." What's so strange about that, exactly? What is strange is how few people know this and/or why some of them are lying about it on the internet.
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  10. @ I did just that some 40 years ago when I got my PhD in physics. You need to pay more attention in school, kiddo. ;-)
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  11. @ Of course you do. You keep begging me for attention. :-)
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  12. Dude, interference is the absence of self-interaction. We tried to teach you that in high school. ;-)
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  13. Interference patterns happen in linear systems with phase delay. This experiment is linear and it has phase delays. There is nothing to see here.
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  14. What is weird about classical wave phenomena? You can see them on any pond and in your bathtub.
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  15. You can find optical bench setups for this experiment if you do a Google search. That's not important, though. What would be important and what I can't find are papers with proper error analysis. Quantum mystics don't seem to be into that. It takes a lot of time and work to do well controlled experiments and I doubt the field has either.
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  16. Where did you see particles go places in this experiment"? Scrap that. Where did you ever see any particles? :-)
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  17. There are no photons in the field. The field is the field. It contains a certain amount of energy (and even that is, technically, not true, depending on the boundary conditions, the total energy in the field is not well defined for a thermal state, for instance). A photon is simply the amount of energy that gets exchanged during an emission process into the field or that gets absorbed during an absorption process from the field. That these amounts of energy exist as individual "packets" inside the field is neither backed up by experiments nor is it part of the formulation of the theory. It's just poor mental pictures that get repeated over and over again by people who don't understand the physics and the theory of the electromagnetic field.
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  18. It isn't. ;-)
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  19. The double slit experiment was explained by Young in 1801 without any gobbledygook. ;-)
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  20. There is no randomness in nature at all. Not in quantum mechanics and not in anything else, either. You were simply not paying any attention in high school. ;-)
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  21. @ Yes, you weren't paying any attention in high school. Why do you keep proving this over and over, again? Does the world really have to care about every kid in school that failed to pay attention now? ;-)
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  22. @ Yes, it is obvious that you were binge drinking a lot. ;-)
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  23. @ I read all of that. ;-)
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  24. It doesn't. End of story. ;-)
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  25. There is no such thing as wave function collapse. You won't even find a proper scientific definition for that nonsense in the literature.
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  26. Here, let me give you some attention. ;-)
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  27. All you are really learning from these experiments is that the fathers of quantum mechanics were right in 1927. Not that we needed to check that, again. It's proven beyond any doubt by libraries full of atomic, molecular, nuclear and high energy physics spectra.
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