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      CommentAuthorTrim
    • CommentTimeAug 11th 2021
     
    'Holy grail discovery' in solid-state physics could usher in new technologies.

    https://techxplore.com/news/2021-08-holy-grail-discovery-solid-state-physics.html
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    Unseating silicon will be a good trick. Not so hard with batteries, but not easy either.
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      CommentAuthorAngus
    • CommentTimeAug 11th 2021
     
    Earth is 15% Si and almost 0 manganese bismuth telluride.
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    I don't have a Nature subscription, so don't know if an energy density estimate was made. Gut feel says that energy storage based on magnetics is going to have an uphill battle against chemical energy storage.
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      CommentAuthorAngus
    • CommentTimeAug 11th 2021
     
    This is the closest they come to saying anything about it:
    Further integrating this new topological physics with spintronics could give rise to topological antiferromagnetic spintronics7, in which the stor- age, transportation and manipulation of magnetic data could become much faster, more robust and energy-efficient.


    Note that "efficiency" is not "density".
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      CommentAuthorTrim
    • CommentTimeSep 1st 2021
     
    Fast tool developed for quantum computing and communication

    https://phys.org/news/2021-09-fast-tool-quantum.html
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      CommentAuthorTrim
    • CommentTimeSep 12th 2021
     
    Quantum gas free fall experiment creates coldest temperature ever recorded.

    https://newatlas.com/physics/coldest-temperature-recorded-quantum-gas-freefall/
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    The super bizarre quantum eraser experiment - by a physicist
    https://www.youtube.com/watch?v=l8gQ5GNk16s

    (Some good links in the description)

    Like entanglement, this makes a mockery of our conception of space and time.
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    What constitutes a measurement? It sure as hell isn't that 1970s woo about consciousness. It seems to have to do with the act of entangling the experiment with the environment somehow. Of course, nobody really knows what those words mean either, so we might as well stick with "measurement".

    If we record which-way information in a sealed box (i.e. isolated from the environment) do we get fringes? Only if there's no possibility of later opening the box.

    What if we toss the box into a black hole?
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    We have the physics but not yet the technology to create kugelblitzer (micro sized black holes). These are objects which weigh as much as an aircraft carrier yet measure a fraction of a percent of the radius of a proton, and evaporate on timescales of nanoseconds to a couple of years. Once we do, mixing light paths with these in delayed choice quantum eraser experiments could be very fruitful.
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      CommentAuthorTrim
    • CommentTimeSep 15th 2021
     
    Can you please make sure that such a dangerous experiment is done long after I am still available to die, thanks.
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    Photons disappear into black holes everywhere all the time. Is that what scares you?
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      CommentAuthorTrim
    • CommentTimeSep 15th 2021
     
    No what happens when they come out.
    • CommentAuthorBigOilRep
    • CommentTimeSep 15th 2021
     
    Posted By: Andrew PalfreymanPhotons disappear into black holes everywhere all the time. Is that what scares you?

    Scares me. What if we run out of photons? How will I watch TV?
    • CommentAuthorloreman
    • CommentTimeSep 17th 2021
     
    Posted By: Andrew PalfreymanWhat constitutes a measurement? It sure as hell isn't that 1970s woo about consciousness. It seems to have to do with the act of entangling the experiment with the environment somehow. Of course, nobody really knows what those words mean either, so we might as well stick with "measurement".

    If we record which-way information in a sealed box (i.e. isolated from the environment) do we get fringes? Only if there's no possibility of later opening the box.

    What if we toss the box into a black hole?


    So the discrete “experiment’ is impossible to disentangle from some sort of “quantum flow”? It’s “Schrodinger’s observer” who is in an indeterminate state, not the cat in the box?
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    Perhaps the experiment, the observer and the environment are all part of a single wavefunction.
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      CommentAuthorAngus
    • CommentTimeSep 17th 2021
     
    Of course they are. You can imagine a wavefunction for anything. The rest is just engineering.
    • CommentAuthorloreman
    • CommentTimeSep 17th 2021
     
    What if there’s a chocolate frog instead of a cat behind the information curtain?
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      CommentAuthorTrim
    • CommentTimeSep 17th 2021
     
    Is it made by Cadbury?
    • CommentAuthorloreman
    • CommentTimeSep 17th 2021
     
    These are the questions that perplex the entangled observer