How can you know the quantum state of all in and on the planet *and* duplicate it?
This is one of the issues with concepts like these.
They presuppose impossibilities. They’re great sci-fi but as there’s no provability, it’s just bedtime fairy tales. Useful for some mathematical work? Sure. But still fantasy.
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Information is created and destroyed.
The assumption that it isn’t is a necessary fiction for the math to work but it’s still a fiction.
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Sci-fi at present. How big will that computer be that contains all of the quantum states? What about the error checking mechanisms of that computer? [how many bits for error correction? That takes up room too]. Plus backup systems for those quantum states.
Perhaps you could enable compression which might help somewhat.
But then you have to include the relativity of spacetime. The grid isn’t fixed like a computer screen or a hologram.
In short there’s ‘meta’ values beyond the bit states such as location, time, effects of spacetime upon the systems such as gravitational centers of objects that aren’t captured by the quantum bits themselves.
You can believe these things if you wish but the most you’ll end up with at present is a simulation of reality that can work on a computer with fixed spacetime values – a linear time progression, and lack of processes in place.
The logistics are staggering. We can’t even effectively predict quantum effects of three-bodied states well except I *think* in the case of one form of helium in one particular configuration among many which is progress but far away from even reaching the level of chemistry.
This bothers me because I believed we “almost had it all nailed down”. But that’s before I learned about chaos. It’s before I learned about complexity theory. It’s only simple at the overview but if you poke just a little beneath the ssurface it’s not so simple.
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It’s a hard reality to accept. MAYBE it will be provably right someday. Maybe the Doctor will come by and take me for a ride in his TARDIS. [or her – I think they’re FINALLY having a female doctor – and one of the candidates is perfect for the part].
I hope so. I want to believe David Lewis’s Plurality of Worlds.
https://en.wikipedia.org/wiki/On_the_Plurality_of_Worlds
[which is different from quantum physics’ multiverse]
But when I write a few words on the screen and there’s a glitch and the information isn’t saved or I have a passing thought when I first wake up and it’s gone because I forgot to anchor it…
..where did it go? If I didn’t anchor it it’s gone.
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This “passive backup system” of all information is a fantasy that makes math work well and causes us to place trust in the physicists. They don’t got it figured out yet but they will goes the promise.
Meanwhile there’s the rest of life.
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There’s also an annoying divide between theory and practice where theory has gained dominance over practice. This is good for University funding and academic jobs creation: I’m all for pure research. We need it. It inspires us and pushes us forward in unexpected directions.
At the same time, “Does it blend?”
Example just now: Someone comes out to the porch. “Ken, sorry to tell you but the water is out”.
Thankfully I know what to do. I go in, water’s out. I go over to the magic little spark box that turns the well pump on and off.
I unplug it, get a pencil inbetween the contacts, swivel it a few times to take off the carbon, put the cover on, plug it in, water’s back on.
Now in theory, that shouldn’t happen Everything should function to specifications. Electric in, magnetic/electrical magic pump box turns pump on, pulling water into a tube that goes through a lot of contraptions I don’t keep filled, into the house so they can use water for their dinner.
I WANT things to just work. I want the schematics and the realities to match.
But when do they ever?
We gotta have both : the dreamers and the engineers. But I think it’s important for us to be both ourselves so we neither lose our sense of wonder nor get our head so far into the clouds that we get confused when something doesn’t work like it’s supposed to.
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What deterministic quantum state? There isn’t. Or, do you believe in parallel universes as being real? That’s the only way you’re going to get around indeterminacy. How can you have a single wave function for the entire universe? At present, it’s not possible unless you want a universe without gravity for example.
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You’re making beautiful sounding platitudes that I *wish* were true and maybe if it was 1915, they’d be true.
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The latest popular soup of the day is holographic universe, posited by his friend and competitor, whose name I just forgot.
But it’s another case of map/territory. It’s a beautiful map that can explain itself and can be explained by all the tools that made the map. It’s useful *in that field*.
It’s useful for them. Happy fairy tales for us.
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It’s axiomic in quantum physics that information cannot be destroyed. It *must* be that way for quantum physics to function.
They’ve even shown in complicated experiments that under these specifically controlled laboratory conditions, no-hiding and no-cloning and no-deleting have tentatively been shown to be provable.
Under those conditions. In that environment.
It may map to everywhere. I sure hope it does.
Meanwhile, life goes on. Can I throw out my hard drive now? Nope. “But they said at a quantum level…. ”
That’s great. Meanwhile…
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“But maybe they can create a REALLY BIG COMPUTER that’s bigger than the whole GALAXY someday and it can freeze ALL the quantum states at a particular point in spacetime (lol as if you can have a singular point in spacetime because you *can’t* because relativity – hi! -) –
AND capture gravitation at a quantum level (OOPS NO GOOD THEORIES FOR THAT YET)…
it’s _mostly_ Sci-Fi supported by mathematics with the occasional WOW experiment to keep light-weight skeptics from giving up entirely.
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I love the sciences and physics in particular more than I should. I also know where they’re missing the mark, especially with regards to science advocacy.
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The pesky uncertainty principle isn’t going anywhere. It’s critical and crucial.
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But it’s nice of you to presume I sit in a bubble separated from those that do.
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The “quantum world” is indeterministic.
You believe a 19th century theory about knowing the positions of everything means you can recreate everything.
Laplace was a genius but he was wrong.
https://en.wikipedia.org/wiki/Laplace’s_demon
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“Information can neither be created nor destroyed” helps quantum physics function properly.
But the problem is: Laplace’s demon. Why do we have statistical multiverses? Because they’re trying to prove Laplace was right.
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There’s “softer” ways to determine position + speed that they’ve been working with.
For example, they can take many small samplings and repeat repeat repeat over and over again to come up with a “gentler” way to determine position and speed ‘nearly’ simultaneously.
It’s a hack but it’s been useful as computers get more powerful.
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Tell me about your deterministic computer. The pesky uncertainty principle.
Do you agree that a deterministic computer is not possible and that the uncertainty principle is not just a ‘little hurdle’ to overcome but fundamental?
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I’m paying attention. You’re throwing away a fundamental aspect of quantum physics to make your plan work.
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“I have this marvelous plan that will work perfectly, save for this Unicorn that’s required for it to work”.
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I’m fine with the people doing the work. I’m less fine with science advocacy education and media misreporting feeding fairy-tales into the minds of millions, making implications of possibilities they’ll never see.
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Education was lack of money. A women is no problem to acquire. A life, I have. Your pity you can save for a lost kitten.
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