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The Zen anti-interpretation of quantum mechanics (2021)

scottaaronson.blog

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Re: The Zen anti-interpretation of quantum mechanics (2021)

#21
post #6

This feels like a cop out. Like sure, you can just do the math and get results and not worry about it. But what's the motivation here? When you get down to it, he seems to believe many-worlds is true, BUT holds the philosophical position that you shouldn't, like, care. Because there's no practical benefit to caring; because it doesn't help you with the calculations. But, hey, I still care! What the real nature of rea…

[deleted]

Re: The Zen anti-interpretation of quantum mechanics (2021)

#22
It's so odd to read about QM by people who don't go into a lab and do QM experiments. Like, this whole article is about the math currently used to make predictions using QM. Not what actually goes on when you prepare entangled particles, not what happens (physically), etc. The "interpretation" of QM (IE, how do we square our mental intuition about how physical matter and energy behave) isn't super interesting, as long as you can retrain your intuition to help make predictions about interesting experiments. Unlearn you must.

Re: The Zen anti-interpretation of quantum mechanics (2021)

#23
post #6

This feels like a cop out. Like sure, you can just do the math and get results and not worry about it. But what's the motivation here? When you get down to it, he seems to believe many-worlds is true, BUT holds the philosophical position that you shouldn't, like, care. Because there's no practical benefit to caring; because it doesn't help you with the calculations. But, hey, I still care! What the real nature of rea…

I think it's beyond being a cop out; I suspect that some of the things that he's dismissing might be gravitationally relevant:

https://news.ycombinator.com/item?id=31630528

Re: The Zen anti-interpretation of quantum mechanics (2021)

#26
post #24

The right frame of mind is not "shut up and calculate", it's "shut up and make testable hypotheses and then invalidate them experimentally".

Even if the different interpretations currently have no testable hypotheses, it is still significant which interpretation you subscribe to, because it guides how you think about the physics, and may prevent you from thinking in certain directions, or “out of the box”.

The blog post’s Zen approach sounds like an agnostic stance, which probably isn’t a bad thing in that regard.

Re: The Zen anti-interpretation of quantum mechanics (2021)

#27
post #15

The article misses that we do not know how classical world that we perceive arises. Ultimately according to QM the whole universe is just single wave function with no probabilities. But this contradicts our experience of the classical world including that we measure probabilities. So we need to explain that to avoid various very ad-hock notions of classical measurement device and similar routes. There are attempts to…

In the single wavefunction, beings who perceive classical reality arise from mere wavefunction mathematics. How does this not answer the question? Once you can locate yourself in a system, the system is adequate as a physical theory of your phenomenological state.

This does not explain how a classical observer gets probabilities that are precisely measured. In universe-as-a-wave-function there are no probabilities. So how exactly do they arise and what they mean?

Re: The Zen anti-interpretation of quantum mechanics (2021)

#28
post #18
post #16

What I don't get is why people are more concerned with how Qauntum Mechanics works than they are with the way in which, for example, electro magenetic waves travel in a vacuum. Like we can "physically" understand how sound travels, and we can "visualise" that as a "mechanism" right? But we have no similar way of "physicalising" the way in which light travels, but no-one seems to have any trouble accepting that. Quant…

Quantum mechanics has wave function collapse, which is both essential in applying the theory to explain any physical situation, and at the same time not described by the theory. Other than "and then it collapses". Classical theories don't have this problem.

And then the whole notion of the collapse is not really compatible with relativity.

Re: The Zen anti-interpretation of quantum mechanics (2021)

#29
post #27

Earlier quoted context omitted.

In the single wavefunction, beings who perceive classical reality arise from mere wavefunction mathematics. How does this not answer the question? Once you can locate yourself in a system, the system is adequate as a physical theory of your phenomenological state.

This does not explain how a classical observer gets probabilities that are precisely measured. In universe-as-a-wave-function there are no probabilities. So how exactly do they arise and what they mean?

My understanding is that this is just the law of large numbers. Most branches match the mathematical probabilities very closely, and hence that’s what we observe. Yes, people on one of the rare branches where things behave differently wouldn’t observe that, but we simply happen to not be on one of those rare branches.

Re: The Zen anti-interpretation of quantum mechanics (2021)

#30
> OK, but are the quantum states “ontic” (really out in the world), or “epistemic” (only in our heads)?

Scott's answer to this seems like a cop-out. He's basically saying "I can't tell which things are epistemic or ontic, and this all seems very complicated, so I'm going to assume the distinction doesn't exist."

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