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Technology: More quantum weirdness.

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  1.  
    Posted By: AngusYou can't pass the photon from filter to filter if you detect it.
    This, I think, is the problem here. All 3 events are consecutive measurements of electron spins.

    I thought the 9/16 statistic interesting. I wonder if Carroll carries that fraction around in his head. I wonder if it's 33/64 for one more measurement (i.e. the general formula).

    ETA: 27/64 if I did it right, so the general form is (3/4)n
    •  
      CommentAuthorTrim
    • CommentTimeJun 26th 2020
     
    Theorists calculate upper limit for possible quantization of time.

    https://phys.org/news/2020-06-theorists-upper-limit-quantization.html
    •  
      CommentAuthorAngus
    • CommentTimeJun 26th 2020
     
    Posted By: Andrew Palfreyman
    Posted By: AngusYou can't pass the photon from filter to filter if you detect it.
    This, I think, is the problem here. All 3 events are consecutive measurements of electron spins.

    I thought the 9/16 statistic interesting. I wonder if Carroll carries that fraction around in his head. I wonder if it's 33/64 for one more measurement (i.e. the general formula).

    ETA: 27/64 if I did it right, so the general form is (3/4)n


    I missed the link to a video. I'll go back.
    There do seem to be some other types of weirdness associated with electrons but its over my pay level. Most things are, now.
  4.  
    Tangential philosophising is cheap, though. It's all I can afford these days.
  5.  
    Posted By: Andrew PalfreymanThe general form is (3/4)n
    At least this makes sense. For the nth measurement, there are 4 possibilities, 3 of which are allowed by QM:
    - an orthogonal axis to the (n-1)th measurement's axis is used, so the result is indeterminate (2 possibilities of 4)
    - the same axis to the (n-1)th measurement's axis is used, so the result is determined to be the same as before (1 possibility of 4).

    It is the circumstances surrounding the disallowed case which I find so mysterious. The simple act of making an intermediate measurement on an orthogonal axis allows the once-disallowed result to now occur.
    e.g. disallowed: 0 1, but allowed: 0 + 1
  6.  
    Posted By: alsetalokinIn other words, it's all fuel for the shitrocket.
    In one of Carroll's Other Many Worlds, the shitrocket is a reality in a society dominated by cruelty and a desire to travel. The galley slaves are the engine, and feed like Sumo wrestlers before the flight.

    Which reminds me; never answer the question "Do you like sex and travel?"
  7.  
    Wasn't there a movie like that? Some train speeding through an ice-age snowworld....
    •  
      CommentAuthorAngus
    • CommentTimeJun 26th 2020
     
    Posted By: alsetalokinWasn't there a movie like that? Some train speeding through an ice-age snowworld....


    Snowpiercer. Great film. Lousy series.
    •  
      CommentAuthorTrim
    • CommentTimeJun 28th 2020
     
    Scientists Have Demonstrated Quantum Entanglement on a Tiny Satellite Orbiting Earth.

    https://www.sciencealert.com/scientists-manage-quantum-entanglement-on-a-satellite-orbiting-earth
  10.  
    Into The Impossible: Episode 25 - Quantum Theory and the book "What Is Real?" by Adam Becker
    https://www.youtube.com/watch?v=PxCN0TOvUEY

    Philosophy of science is not irrelevant.
    Einstein as sage; Bohr as con man.
    •  
      CommentAuthorTrim
    • CommentTimeJul 2nd 2020
     
    Tiny quantum fluctuations observed moving 40-kg mirror.

    https://newatlas.com/physics/mit-ligo-macroscale-quantum-fluctuations/
  12.  
    reality shudders
  13.  
    Posted By: Andrew Palfreyman
    Posted By: Andrew PalfreymanThe general form is (3/4)n
    At least this makes sense. For the nthmeasurement, there are 4 possibilities, 3 of which are allowed by QM:
    - an orthogonal axis to the (n-1)thmeasurement's axis is used, so the result is indeterminate (2 possibilities of 4)
    - the same axis to the (n-1)thmeasurement's axis is used, so the result is determined to be the same as before (1 possibility of 4).

    It is the circumstances surrounding the disallowed case which I find so mysterious.The simple act of making an intermediate measurement on an orthogonal axisallows the once-disallowed result to now occur.
    e.g. disallowed: 0 1, but allowed: 0 + 1

    The first 11 minutes of this vid illustrate this effect
    https://www.youtube.com/watch?v=IB50S4J4c8k&list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&index=17

    Carroll's "explanation" really isn't.
  14.  
    I think there is a demonstration using polarizing filters that illustrates this effect (or a similar one) with photons.
  15.  
    What's mysterious to me is that the superposition is restored.
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      CommentAuthorAngus
    • CommentTimeJul 4th 2020
     
    Posted By: alsetalokinI think there is a demonstration using polarizing filters that illustrates this effect (or a similar one) with photons.


    I did try to make that point.
  17.  
    It's still mysterious to me that the superposition is restored.
    •  
      CommentAuthoraber0der
    • CommentTimeJul 4th 2020
     
    You guys might should be reminded of the fact that "Everything is quantum".
    That's why you are here, right?
    •  
      CommentAuthorAngus
    • CommentTimeJul 4th 2020
     
    No.
    •  
      CommentAuthoraber0der
    • CommentTimeJul 5th 2020
     
    Sure?

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