Comment on The real double-slit quantum eraser they don't want you to know about!
fiat_lux@kbin.social 1 year agoI wouldn't agree with your paraphrased characterization but I think the reason that the experiment results are widely misunderstood is for the same reason any retraction or updated information can't reach the entire same audience as the original information.
The experiment was popularised by Feynman in the 60's and widely discussed as the basis for quantum mechanic. Feynman generally was a fucking rad dude, but he did have a penchant for the poetic, which is probably why he was so popular. Einstein weighed in on the concept too, so big names with big topics in a lunar-landing sci-fi loving era. And quantum mechanics was a fun new mindfuck development in its own right.
So, when a few decades later, the tech catches up to the theory, in experiments by smaller-fame scientists, and the theory further refined; then you've got a legion of adults who grew up with the 60's romantic understanding published in mainstream media, teaching that to the next generation... and you get this.
I can personally blame Brian Greene's 2005 https://www.penguin.co.uk/books/54483/the-fabric-of-the-cosmos-by-brian-greene/9780141011110. His section on the experiment didn't feel right at the time, but feels aren't reals, so I just went with my very limited understanding of an expert's overview. The refined explanation now feels a lot more sensible, for what it's worth.
HawlSera@lemm.ee 1 year ago
Okay so what would a more accurate summary be, because what I got from that is that the Dual slit was debunked by us not having the proper tools to actually measure things this small. If that’s not it then I sincerely do not get it.
fiat_lux@kbin.social 1 year ago
The experiment is limited by our existing tools and evidence, and this will impact both its accuracy and our interpretation of the results, but it's the best we have for now and still worthwhile as a way of producing additional evidence for other researchers.
Also, researchers typically don't condense information into soundbites well, which prevents people from easily understanding and remembering the accurate information. Which allows bad interpretations by other people of the researchers interpretations of rough results to gain traction.
In other words, normal science problems.
An experiment isn't bullshit just because we can't achieve perfection in methodology or human analysis. And we can't perfect our theories and tools without multiple inaccurate answers being compared to find congruence.
The bullshit starts with the people whose theories which rely on the inaccurate parts refuse to modify the theory when the evidence disagrees.
HawlSera@lemm.ee 1 year ago
Basically my understanding as gathered from the original post, is that the Dual slit experiment does not actually make any meaningful statements because the thing that it intends to measure cannot be accurately measured. However the measurements we got from the imprecise are weird, but that’s to be expected because that’s basically the same as looking at the moon with a magnifying glass and trying to make as accurate astronomical predictions
TauZero@mander.xyz 1 year ago
I want to clarify that the “cannot” here refers not to the inadequacy of our tools (which hypothetically could have been fixed in the future by building better tools), but by a fundamental prohibition of the quantum mechanics theory. Practically, the single-photon lasers and detectors used here are like 90%+ efficient - plenty good enough to distinguish between the two monkey scenarios. But some observables in quantum mechanics are “orthogonal” - you can measure one or the other, but not both at the same time - the math will not allow it. The typical example of that is “position” and “momentum” of a particle.
The math is quite beautiful actually, the analogy I’d use is something like asking “Which way is east at the North Pole?” In your head you can either know “This direction is east.” or “I am standing at the North Pole.” but you cannot hold both pieces of knowledge in your head at the same time.
The orthogonal observables in this experiment are the “which-way top/bottom slit” information and the “which-interference-category Pattern 4/Pattern 5” information. It’s even more beautiful in the delayed choice quantum eraser experiment that I was ranting about here. There, both pieces of information are stored orthogonally in a single photon. You can choose at a later time to either measure it one way, which will tell you the which-way info, or in a different way, which will tell you the interference category info, but there is no hypothetical way to measure it in both. The only way you can get the category info out to allow your computer to draw the interference pattern is if you guarantee that the which-way information has been irrecoverably erased. It is as if the whole universe conspires to censor this information from you! But it’s just the consequence of the math rules in use.