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An experimental test of the quantum multiverse (why the quantum multiverse is falsifiable).

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Everettian quantum theory (i.e: the quantum multiverse) can be tested against other theories - like all collapse models such as the so-called "Copenhagen Interpretation". David Deutsch explained this in this paper: boulderschool.yale.edu/sites/... in 1984 but it remains poorly understood even after a popular account was given by David in this book by Paul Davies and Julian Brown "The Ghost in the Atom" available here: www.amazon.com/Ghost-Atom-Dis...
Those accounts by David are technical and very much for professional physicists who should consult those either in lieu of this video or in addition to it should questions remain.
In this video I attempt to explain a version of the experiment it in terms for a lay person untrained in physics. David has pointed out I did not "didn't explain why Parlox can't remember which path the photon took: it's because he had to reset the mirrors to their original state, and the only way to do that involves connecting them again to his memory of how they were, which wipes it." (quote from @DavidDeutschOxf Twitter). So this needs to be kept in mind when listening.
This video is excerpted from a much longer one here: • David Deutsch’s “The B... which is part of the Multiverse Series here: • The Multiverse (Everet... which is itself just a small part of the podcast ToKCast found on RU-vid here / @bretthall9080 and anywhere podcasts are found (Just search for ToKCast).

Опубликовано:

22 мар 2023

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Комментарии : 11

@damslifevlog5031 Год назад

Thank you for your passion man. Love ya

@vitor5636 Год назад

Wouldn't it make more sense that, in order for the experiment to work and the AI split and then recombine, it simply couldn't detect which mirror the photon strike, only that only one mirror were hit, because if it could record which mirror was hit, then that information would be stored somewhere in its circuitry, say in a simple pendrive, and then when recombination happened, the universe would have to choose what information would be found in this pendrive, assuming each bit would represent one possibility like 0 means UP and 1 means DOWN, the split universes would have opposite bits and somehow would have to arbitraryly define each bit, there couldn't be a undefined state for these bits, maybe it would be all ones or all zeros or a random distribution, but if the information was never stored, then truly the only difference the split universes would have would be the different paths of the photon, which either way resulted in truly the same universe, say if the information in the pendrive was wether only one mirror was hit (0) or both (1), then both split universes would agree that then pendrive contained all zeros, and it would be easier the merge the realities, that is, assuming the AIs hardware would function similar to today's computers, which don't "forget" information like a human does

@vitor5636 Год назад

Just my genuine curiosity

@subjekt5577 Год назад

To my understanding the idea could be to wire up the mirrors in parallel such that you can't distinguish which detector was hit, only that a detector was hit once. The "wires" making it up would locally know but would immediately forget what they saw, which allows them to recombine/become indistinguishable in the "future"

@rusticrick999 6 дней назад

If the multiverse interpretation is correct, then although the photon takes both U and D paths in parallel universes, Parlox would have also split into 2 sets of universes, and would thus only detect the photon going to either U mirror or the D mirror, but never both, because Parlox, being a macroscopic object, cannot recombine from separate universes (because macroscopic objects undergo decoherence). Only elementary particles can do that, as long as decoherence is avoided. He would never be able to say the photon was detected at both mirrors. So this experiment would refute the MWI. The other problem is that when the photon interacts with the mirror, a signal would have to be transmitted to Parlox's brain, otherwise he wouldn't become aware of it, which would result in decoherence of the photon, just like when you use photon detectors, so the photon would no longer interfere or recombine with itself.

@benjaminhope1524 5 месяцев назад

‪Wouldn’t decoherence happen as a result of the processing Parlox’s brain would have to do to understand and decide not to reveal which mirror he felt got hit? ‬

@Klaymen_ Год назад

On Parlox not remembering which mirror was struck; Isn't it necessary that he can't remember for the two universes to recombine? Your story makes it sound like the event of recombination is what makes him forget.

@diemilio 11 месяцев назад

Hi Brett. You mentioned you will talk a bit more about the multiverse in later episodes. Would it be possible to have one on how to interpret probabilities in the multiverse theory? I’ve watched this talk by David, but I really struggled following along. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wfzSE4Hoxbc.htmlsi=V2YTMmqlYNUerku0 Huge fan of yours! Love the content.

@hd1080pal Год назад

Just like antimatter, neutrinos and gravitational waves it will take time to confirm what we already know ;) A tip of the hat to Ian M Banks!

@gabrielthuneberg1299 5 месяцев назад

Quite large library you have. Do you live with mom and dad..?

@srghma 5 месяцев назад

In virtual reality We will fix death and will live like kings, children are our clones depending on how much time we spend with them Why not live with mom then?