Wave function collapse Puns

100s upon 100s video explain the concept pretty well on YouTube. But they all show an animation.

Surely there must be an actual experiment video (in a lab?) that detects particles as wave and then "measures" it to trigger the "collapse". Be it which way experiment or any other variation.

The closes thing i found was this :

https://youtu.be/bpkdoSxC-VM

But in sure there must be a better /more authentic experiment out there.

So with my extremely rudimentary understanding of wave form collapse, with photons we only know where they are after we observe them. Before that, we only have an estimate of where they are, which is represented as a wave of possible places that photon could be (before measuring it).

Are atoms the same way? And if not, are neutrons and electrons and protons the same way? In that we do not know their precise location until we physically observe them.

Thank you.

Basically the title, if you have two entangled particles and one of them is measured, can you tell that the other particle's wave function has collapsed? Or does entanglement just mean you'll measure the same thing when both particles are measured in the same basis, but the wave function collapse isn't actually a measurable thing?

Hey everyone! Happy 2022,

Some time ago I created a single-file Wave Function Collapse (wfc) library in C, and an accompanying command-line tool. I meant to share it earlier:

https://github.com/krychu/wfc

For those not familiar with WFC, it’s a method of procedural generation that takes a small input image and generates a larger image, which is locally similar to the input image. The local similarity yields interesting results. A good read about WFC can be found here: https://www.gridbugs.org/wave-function-collapse/.

So WFC is particularly useful for procedural map generation in roguelikes. This is the context in which I found out about the method, in a talk by Brian Bucklew (Caves of Qud): https://www.youtube.com/watch?v=fnFj3dOKcIQ.

I’m hoping that the library and/or CLI tool might be useful for other roguelike creators. I haven’t used the lib in a project myself so I consider it an early version. But if anyone happens to use it, I’m happy to hear about any issues and get them fixed!

Thanks!

I've been trying to work in a personal project using this technique but I'm pretty much a newbie on Unity. I don't even understand how to use it on the engine -is it a plugin or a code I have to make on C#? If someone has the patience to explain the algorithm to me, I'd be very thankful. Sorry if it's a dumb question!

I am guessing many here "roll their own" but wanted to ask is there a standard wave function collapse library for python that people here use?

https://www.reddit.com/r/seancarroll/comments/koyi5z/saw_this_meme_in_rall_and_had_to_crosspost_it/

This happens in quantum physics and every quantum physicist knows it happens because its been known to happen for almost a century. The question is why does it happen? Some say:

1. consciousness collapses the wave function
2. others say consciousness doesn't collapse the wave function
3. others say we still don't know why it collapses and
4. others make up tales of universes that nobody has ever seen or heard from so they won't have to explain what is sometimes aptly called the measurement problem

If you say you don't know why it collapses, that is fair enough. However if you say nobody knows or you know it isn't consciousness then you are deliberately misleading people.

I'm saying Jn. 14:20 is true and I can prove it. However its more difficult to prove when people are lying about the role consciousness plays in quantum physics.

Somebody posed this question on the quantum mechanics sub a few days ago (1) Can Consciousness in some way collapse waves : quantummechanics (reddit.com)Where are all of the naysayers on that sub? I invited a few posters from the Christian subs to join that debate that have been "picking my brain" and one of them had the unmitigated gall to tell me he wasn't interested after picking my brain for two weeks straight. I apologize to others for my tone being wrong the last few days. I got kicked off of the debate religion sub because the naysayers ganged up on me and I had to assume some sort of defensive posture. My answers got too brief because I got tired of typing the same thing over and over. It got so bad that I just put it in a word document and pasted it in so they banned me for "breaking rules" It's no secret that most of the reddit posters are atheists. They deserve their day in the arena just like everybody else. I'm just asking for the umpire to call balls and strikes the same for both teams. Is that really too much to ask? Anyway I think the handwriting is on the wall. I feel I have a calling. Maybe I've done what I was supposed to do. Maybe it isn't over yet. Time will tell.

I've been implementing wave function collapse with 3D prototypes for a while now, and while it works as I'm telling it to - I am unable to find a solution for invalid connections without propagating an empty grid with the rules I attempted.

What I'm asking is how does one construct the logic of Wave Function collapse around connecting constraints on opposite faces while also managing invalid connections or constraints that have no vertices on any bounding face of the prototype cube.

So far so wack - but whats happening is the propagation is treating the invalid constraint of prototypes as a valid connection.

https://preview.redd.it/o04r7hypjy181.png?width=789&format=png&auto=webp&s=577f59842287bad296e4103c3591f846d3fb1b48

Removing the invalid constraints from consideration entirely creates empty superpositions with unsolvable constraints.

https://preview.redd.it/t0ipl1tqjy181.png?width=789&format=png&auto=webp&s=cc0d5828346f14773ab6d4ede2b119e0e21bfd2d

I know Im missing something fundamental here but Ive fried myself trying to solve it on my own due to the complexity of the system. Please let me know if this is solvable or if Im even asking in the right spot

Thanks

Since consciousness is not relevant to experiments, shouldn't all physical interactions across space count as "observations"?

Why it is that for instance a photon's wave function collapses when "observed" by some light sensitive screen, but it is said to be in a state of superposition, or being "everywhere at once" before that? Shouldn't the photon constantly be being "observed" by all the atoms and molecules in the air? What is "special" about the detector in the experiment?

I've seen varying definitions of "observation", including something that causes an irreversible change in information, measurements of a system under study, and something that leads to decoherence of an observed system.

I'm confused why the wave function would not perpetually be collapsing due to physical interactions, and why only the instrument detection counts as a wave function collapsing observation. Shouldn't all particles and energy be continually undergoing irreversible changes in information, and being "measured" by each other?

Thanks for all the responses to my "light wave" question!

If indeed the "wave function" is a representation of the field of probability of the spatial (temporal?) occurrence of the thing (as a particle or as the effect on something else), can we understand "collapse of the wave" to be simply choosing one of the locations from the probability distribution?

*** UPDATE 11/19/2021 ***

Thanks from the tip from ExUtumno, I was able to get it to work!

I was watching these generate for hours! Next step is to adjust the data structures and algorithms more effiecient to get a more larger scale generation going!

Github link here.

https://i.redd.it/x3d08gx49p081.gif

https://i.redd.it/ilhccdu79p081.gif

************************

Hey all, i'm trying to create a WFC tool to automate tileset generation to simplify dungeon building from tile sets.

When it gets to slightly more complex tile generation, I do get tiles that do not get resolved :(

Has anyone done this and can see where my issues lies?

Water/Grass Border Tiles sometimes don't resolve correctly.

Here is my process:

1. Check if There are Undecided Tiles
2. Select Tile Index with Lowest (Shannon) Entropy
3. Check if Tile with Lowest Entropy Exists or Pick the Longest Lasting Undecided Tile
4. Select Tile based on Existing Probabilities else Select Random Tile
5. Update Probabilities Based on Tile Selected At Coordinate
6. Finally, place Tile if Tile was Selected

Code [here](https://github.com/Sunnigen/kivy-wfc)

kivy-wfc

Github link

Looking at all other Wave Function Collapse algorithms I've sought to create my own.

I would like some input on how to resolve the contradictions that come from below. The remaining white squares are contradictions that I can't seem to figure out how to avoid.

Possible solutions I have in my head but have no idea how to go about:

1. Backtracking to the last changed tile as soon as a contradiction occurs and pick another tile.

2. From the input map, find a way to create more patterns

https://i.redd.it/54gzs42qx2281.gif

Here is its input map

https://preview.redd.it/82rod2zwx2281.png?width=448&format=png&auto=webp&s=e89f5ca54cec8d490ae9ff17c40abeb684d6b6f5

Here is another instance, one with more contradictions from boats and water:

https://preview.redd.it/6xlojzn0y2281.png?width=762&format=png&auto=webp&s=c23d04077cff9869cd98240ead792f64347a05dc

Here is its input:

https://preview.redd.it/fetm54a3y2281.png?width=304&format=png&auto=webp&s=509654948f5f6bf1ce51b533c1705649a1214f8b

Does anybody know of a good tutorial? I'm getting confused by what the people are saying and how they're labeling their variables.

Do you use number of occurrences (n) or probability of occurrence (n/total samples)? Do you sum the weights/probabitites * log weights/probabilities? I'm just confused.

When the wave function of a photon collapses, it had existed as a superposition of various possibilities, then it appears to "snap" into existence at 1 particular point. My question is, does the apparent path that the photon took also collapse? How real is the path that the photon took? I need to reference the apparatus for the delayed choice quantum eraser experiment and the "which way" detectors D3 and D4. My question is, when the wave function of a photon collapses at D3 or D4, is the path that the photon took a real path, or an apparent path? I'm not sure how to answer this question, but my thinking is leaning towards that the photon only appears to have traveled along a particular path, and it really traveled along all the paths as a superposition. And if the photon wave function traveled as a superposition, it therefore cannot be said to have traveled along 1 particular path, even after the wave function collapses at one particular location. Another way to put it, when a photon is detected at D3 or D4, we really are NOT collecting "which way" data.

Edit: adding a quote from p.16-17 from Dave Ellerman's paper on common QM fallacies:
>"The phrase "which slit" or "which arm information" is a misnomer in that it implies the system was already in a slit- or way-eigenstate and the so-called measurement only revealed the information. Instead, it is only at the measurement that there is a collapse or projection to an evolved slit-eigenstate (not at the previous separation due to the two slits). Walborn et al. indulge in the separation fallacy when they discuss what the so-called "whichpath information" reveals."

Sorry if, as physics questions often go, this question doesn't even "make sense" to ask. But I've been reading how the wave function collapse is instant (just not possible to use it to travel or transfer information faster than c, so it doesn't cause causality violations).

Still, does asking about the "speed" of a wave function collapse make physical sense? Could it be that the propagation of a collapse of a wave function isn't truly instant, just happens at its own speed limit, which (for whatever reason) would be much higher than c and possibly too high to measure? Have experiments attempted to place a lower bound on that speed?

As well, would a hypothetical non-instantaneous collapse (and in the absence of local hidden variables, as implied by the Bell experiments) lead to possible symmetry violations? E.g. (with advance timing synchronization) measure two entangled particles far from each other at exactly the same time, before the measurement on one end propagates the collapse to the other end, and possibly get an impossible state combination?

So I recently saw this funny physics meme where Schrodinger's cat meows from inside the infamous box just as Schrodinger claims that the cat is in a superposition of being dead and alive.

But this got me thinking, what if that actually happens? Is there anything in the original thought experiment that prevents the cat from interacting with the observer?

If not, does the observer hearing the meow count as observation... leading to wave function collapse? But then it follows that the wave function collapsed to the state in which the cat is alive, since the cat couldn't have meowed otherwise.

In more general terms, does this imply that any quantum system that potentially leaks information to the observer (regardless of whether the obsever receives the information or not) cannot maintain superposition?

Let us consider the two slit experiment with electrons.

An electron passes through two slits.

When I do not know which slit the electron passes through, the electron is in a superposition of passing through both the left slit and the right slit, and an interference pattern is seen on the screen.

I place a detector behind the two slits. I gain new knowledge regarding which slit the electron passes through. This gaining of new knowledge collapses the superposition. The electron now either passes through the left slit or the right slit. The interference pattern on the screen disappears.

Now, let us consider the Kim et al. experiment as described in the Wikipedia article on delayed choice quantum eraser.

Whenever which way information is not available for a photon, that photon is part of the interference pattern on the screen.

Whenever which way information is available for a photon, that photon is only a part of the two bright bands seen on the screen.

Now, let us consider the measurement of spin of electrons.

I cannot simultaneously know the spin of an electron in both the z axis and the x axis.

I measure the spin of an electron in z axis. Let us say that I find the spin to be up.

Now, I consider the spin of this electron in x axis to be in a superposition of both being up and down.

I now measure the spin of this electron in x axis. By doing this measurement, I gain new knowledge regarding the spin of the electron in x axis. This gaining of new knowledge collapses the superposition of the spin of the electron in x axis. Once I complete the measurement, I find that the spin in x axis is either up or down. Also, once I complete the measurement in x axis, I find that this gaining of new knowledge regarding the spin of the electron in x axis erases my earlier acquired knowledge regarding the spin of the electron in z axis. Now, I find that the spin of the electron in z axis is in a superposition of both being up and down.

Now, let us consider the Wigner's friend experiment.

Wigner's friend measures the spin of an electron in a particular axis. He gains new knowledge regarding the spin of the electron in that particular axis. This gaining of new knowledge collapses the superposition of the spin of the electron in that axis for Wigner's friend.

Wigner is outside the laboratory.. There is a lack of knowledge about the spin of the electron according to Wigner. So, this lack of knowledge causes Wigner to consider the combined system of the

this is more.. metaphsyical, maybe, but id like atleast a Christian answer. does result of the double slit experiment suggest God is not an observer or even suggest against His existence?

if God is an observer, how could we have even gotten those results?

if God isnt an observer, wouldnt that go against His omnipresence?

thank you, God bless.

First off Felix, I like the theory you we're explaining of parallel worlds.

One theory I like, which sadly doesn't include parallel dimensions, but I've heard that light photons are so fast that they move faster than electrons. The electron which without being observed can freely be a wave length and/or particle simultaneously, and possibly have infinite spin directions. However because light is faster than electrons this causes the light photons to establish a spin and particle form for the electron. So without being observed electron spin and form in multiple ways, but the light photons kind of act as a stabilizer similar to how matter do to the electrons.

Btw I'm poo poo head up on this floor

Okay, so firstly, I need to say that I dont know much about quantum mechanics and about QI either.

However, I think I get the gist of what u guys mean, so there are parallel universes that exist at the same time and u exist in them and "jump" when u die.

Something of this sort

So I guess you are comparing our universes to the wave function in quantum physics, so a person exists in many universes at once, even tho there is only one of them.

However, the wave function breaks down once the particle is observed.

So then, who is the observer in our scenario? Is there even one? Should there be some other condition for the "wave function of universes" to collapse and become definite?

Let me know if it makes any sense xD

Edit: Lets become immortal together, join me on our quest for immortality at r/ExistForever

The purpose of this post is flesh out my intuition for decoherence and irreversible processes, and how those are related to wave function collapse.

• DCQE = Delayed Choice Quantum Eraser

• WF = Wigner's Friend.

From DCQE we see that information ,m, storing the state of a measured system S can be carried away to a large distance. m can later be "destroyed" causing the original system S to maintain its superposition. Wigner's Friend raises the question about where, in a causal chain of events, the wave function collapse is assumed to be occurring.

John von Neumann suggested that we are free too choose any part of the causal chain for where collapse occurs. In interviews , Brian Greene expresses frustration when saying facetiously, "Maybe the knob on the computer is in a superposition!"

Over many years, I have read numerous writing ranging the spectrum from pseudo-science to pop science, all the way to papers published by academics from Princeton. Many times I heard a variation of the claim : wave collapse occurs at the time of an irreversible process taking place. In every instance in which I read this, the author says it very glibly, and then does not expand on the how or the why. It is as if they think this is "obvious" to the reader and they can just move on without elaboration.

I have attempted to google the following search :

wave function collapse decoherence thermodynamic reversible irreversible

This gets hits. But the various websites appear to contradict each other in their claims.

#Reversibility

Another claim occurs with equal frequency. This is that wave function collapse occurs whenever information of the system is "leaked to the larger environment". The larger environment acts as thermodynamic heat bath. But my intuition gets lost here. Does this mean thermodynamic irreversibility, or some other kind of irreversibility? ( I could say more things here about this, related to why a human observer would act as a "larger environment" but that would be speculation and windmill tilting on my part.) I would prefer to see this fleshed out by a more authoritative source.

Lets try to get these ideas fleshed out in a coherent manner so that we can write them into organized boxes on a whiteboard, even if we don't personally agree with them. I welcome your comments or criticisms.

Your thoughts?

100s upon 100s video explain the concept pretty well on YouTube. But they all show an animation.

Surely there must be an actual experiment video (in a lab?) that detects particles as wave and then "measures" it to trigger the "collapse". Be it which way experiment or any other variation.

The closes thing i found was this :

https://youtu.be/bpkdoSxC-VM

But in sure there must be a better /more authentic experiment out there.

I created a single-file Wave Function Collapse (wfc) library in C, and an accompanying command-line tool:

https://github.com/krychu/wfc

For those not familiar with WFC, it’s a method of procedural generation that takes a small input image and generates a larger image, which is locally similar to the input image (locality understood as NxN tiles).

https://preview.redd.it/57xm0yymqia81.png?width=1686&format=png&auto=webp&s=d112678a77e59e6992c82efdfaa0b14fea45b7d4

I came across WFC in the context of map generation for roguelikes, but I believe it can be useful in other contexts as well.

Hope it might be useful for someone!

Can Consciousness in some way collapse waves : quantummechanics (reddit.com)

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