/sci/ - Science & Math

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>>11875355
>Parallel Worlds Probably Exist. Here’s Why

>>11875355
No. It's just bullshit. It proves QM is dumb. Fun fact: Schrodinger originally thought his equation solved for charge density not probability density.

>>11875355
>How can god roll dices?
What? Of course God doesn't roll dice. He flips coins.

>>11875931
The answer, obviously, is that there is no god.

>>11875355
quantum superposition is literally the principle of superposition which is what all differential equations have which basically says that fundamental set of solutions are independent which means they form a vector space (hilbert space in QM) which means that solutions linear combinations of solutions are also solutions and therefore we can use this principle in quantum mechanics to deal with the fact that the particles are not observables, linear operators are (linear maps), so we can just take every possibility as a vector in the hilbert space and their combinations remain solutions to the Schrodinger equation.
Thats what quantum superposition is. yes it really exist. what it represents is irrelevant. maybe it means there is a multiverse of all possibilities. maybe it means we can't fucking find where the particle ever is because theyre small as shit so we need to take every possibility and then just check which one happened at the end. Maybe it means there is one universe but the way particles move is not deterministically defined (this is the actual answer).
But yes, superposition exists.
>>11875404
wrong
>>11875408
wrong
>>11875923
irrelevant
>>11875931
50% chance of being true

>>11875923
Whoever said that the world must "make sense"? The world is weird. The very fact of its existing, itself is extremely weird. Nothing about any of this is normal. We are just used to it.

>>11875355
https://youtu.be/lZ3bPUKo5zc?t=11m
start @11min
1st WTF @22min
2nd WTF @50min

>>11875989
He is pretty upset about quantum mechanics. It's kind of amusing to watch how into it he gets.

>>11875953
But can something exist in two positions literally at the same time though? That's what people assert and they seem to leave no room of doubt

>>11876071
if you're not upset, you don't know qm

>>11876087
If I'm not upset, it's mostly because I'm perfectly open to the quantum weirdness of qm. It seems that it's mostly just the people here who get upset when you try to tell them that their preconceptions about how the world _ought_ to behave are just their monkey-brain intuitions.

>>11876102
it's not that it act's funny, it's that every possibility you can think of is impossible, yet it still works.
@1h8m

>>11876102
it's not that it acts funny, it's that every possibility you can think of is impossible, yet it still works.
@1h8m

>>11876087
based physicist poster

>>11876133
I'm trying to agree with you, here. He's pretty adamant in the beginning that there is something non-deterministic about the world, and that we should "deal with it", which alone seems pretty "funny" to me (or whatever word you want to use here: odd, bonkers, bananas, whatever)

>>11876168
sounds like you didn't watch the video

>>11876086
It's a wave. It's not all at one point its spread out

>>11876086
Now let me tell you about Maxwell's Demon, and how God love's playing Dice with human lives...

>>11876086
>Two positions
Its states, not positions, and its not 2 states, its all possible states. Something can and does exist in all possible states until we observe it.

>>11875355
That's a good fucking video, mostly because I never thought about how wavefunction collapse in a multiverse interpretation is actually supposed to work. Still not sure if I buy it, but now I understand why people would believe in it, the logic seems sound to me.

Infinity exists does it mean finite exist? Think about it.

does math exist? think, have you seen number?

>>11875953
>quantum superposition is literally the principle of superposition which is what all differential equations have which basically says that fundamental set of solutions are independent which means they form a vector space

Fuck, no. In a classical sense the solution to the simple harmonic oscillator is a superposition of the following form A*sin(t)+B*cos(t)
If you want to know what the actual answer is you apply boundary conditions. For instance just say at t=0 the position is 0. If that's true the solution is Asin(t). Later if the range of motion is given as having a maximum of 1 the solution is sin(t)

In quantum mechanics the thing is in a superposition of state, which means it's at all positions at one with some distribution of probability of measuring it somewhere. It's completely not analogous. That's what the thought experiment about the cat is supposed to highlight. In classical mechanics, elements can be superimposed and neatly solved for given boundary values. In quantum mechanics there superposition of state and a probability of measurement and no boundaries.

>>11875958
>Whoever said that the world must "make sense"?

No one. But quantum mechanics is not locally causal anyways, so it breaks other better established rules of physics. The cat deal is just another more intuitive way to show QM Is bullshit, because even infants know things exist even if you aren't looking at them.

>>11876391
>Now let me tell you about Maxwell's Demon,

I don't think you understand that concept. It's not theology. It's a thought experiment about enthalpy and thermodynamics. It's completely coherent and understandable. The conclusion is it takes energy to track and react to information in the environment, so no one can build a machine to violate the laws of thermodynamics and build a perpetual motion machine

>>11876593
>Something can and does exist in all possible states until we observe it.

Bullshit

>>11875355
Dude honestly, reality is inherently deterministic, the iterations of frames which we accurately describe with probability are not comprehensive and thus do not reflect realities intrinsic framework.

>>11876087
surely you have to be both? I'll see myself out...

>>11877665
It doesn't intuitively show it's bullshit. Your intuition is what's bullshit. It's just a silly thought experiment meant to helpfully illustrate what it means for "something" to be everywhere at once or in two states at once. It actually IS in two states at once. This is not just "for pretend" in two states at once. It actually IS that.

>>11877680
Just forget "the until we observe it" part. That's the most controversial part that is hardest to digest. But everything that comes before that is not so hard to grasp. That something can "be" in multiple states at once. How and when that changes is almost a separate issue. Just focus on that for now and realize that virtually everything we know suggests that this is true of the quantum world

I was always heard that Quantum Mechanics and QFTs were just models that used statistical methodsand achieve high accuracy in experiments, and Copenhagen interpretation of probabilistic wave function is just one interpretation, the universe may or may not be probabilistic but QM and probabilistic interpretation give good enough results

>>11879643
yes that's the Copenhagen interpretation

>>11879643
If an electron is smeared out as a wave (and in certain cases it is) it's inherently probabilistic in nature. In the sense that there is only a probability of it collapsing into a particle that occupies a particular position. But if you just stop obsessing about its particle-like nature (it's hard to do, I know, since we are made out of them) the "probability" part doesn't seem so problematic at all. So what if it occupies more than one position at once? What's really the problem with that? There is no problem. That's just how it IS. Trying to look everywhere for hidden variables and pretend the nature of a thing isn't what it actually is is tantamount to wishful thinking. It's tilting at windmills. There is NO problem. You don't have to wish it away.

>>11875355
Quantum mechanics is bullshit.

>>11879696
False

>>11875355
would it kill these guys to be a little less gay?