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Schroedinger's Cat -- Again

11/04/2010 4:27 PM

I am sure everyone is familiar with the cat in the box scenario, that must be observed before the result is fixed in reality.

What if a mechanism and a camera is set up to open the box at a random time,and takes a picture when the box is open,and for the sake of this experiment, the cat will be standing if alive, and lying down if dead.

The film is not developed, but is put in storage.So no one knows the state of the cat.

Is the cat in a state of superposition till the film is viewed? If so, a future event has affected a past event.

It sounds like uber ego to think that we create reality by observing it.

Who observed the big bang, or do we create the past by our theories and observations as well? If that is the case, then present or future events can influence the past, and future events can influence the present.Or have I crossed over that razor's edge?

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#1

Re: Schroedinger's Cat -- Again

11/04/2010 6:41 PM

Del's been neither here nor there for years now. And who knows what states he gets up to when Mrs. Cat isn't observing him.

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#2

Re: Schroedinger's Cat -- Again

11/04/2010 8:45 PM

The film becomes the observer, so the cat is doomed. When we view the film doesn't matter. A chemical change takes place, so the event is 'seen' by the camera.

The big bang thing is supposition, a theory only. Future events can only change our opinion of the past, or our interpretation of it. The actual past is often different from what we now call history, fables, or legend.

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#3
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Re: Schroedinger's Cat -- Again

11/04/2010 9:06 PM

Suppose there is a blind person in the room with the box, and if the cat is alive, he makes no sound,same as if dead.

When the box is opened, what is the state of the cat? Fixed or still in superposition?

If I understand the experiment properly, the raw data has to be observed to become real,so the image on the film itself is in a state of superposition until viewed.

What I am trying to do is determine if a sentient being has to be aware of the measurement to collapse the superposition of the cat. If so, then reality is merely an illusion created by our senses:past,present,future are one,like looking backward,forward,or left or right,but only one view at a time can be processed.

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#4
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Re: Schroedinger's Cat -- Again

11/04/2010 9:27 PM

I think the crux of the experiment hinges on observation. This Hellen Keller scientist invalidates the experiment. In my opinion, the camera qualifies as an observer. I have a web cam that can detect motion, pretty smart device.

Read Carlos Castenada for some real mind twisting, if you like that stuff.

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#5
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Re: Schroedinger's Cat -- Again

11/04/2010 9:30 PM

The question was not really about the cat, it was whether the radioactive atom radiated or not. The atom has dual states, particle and probability, which state depends on whether you look or not. When you look, it becomes a particle and the probability of radiation becomes action or not action.

Not very well explained, I'm afraid. We need an expert.

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#21
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Re: Schroedinger's Cat -- Again

11/05/2010 11:18 AM

Passingtongreen has it right. The original experiment is about radioactive decay and we need to remember that Schroedinger cat was actually applying particle physics to macroscopic objects.

One of the best experiments I've heard of that portrays what Schroedinger was describing is yet another double slit experiment (perhaps it was Schroedinger's but I don't recall). In this one, a radioactive isotope (I seem to remember it beta decay) with a relatively long half-life was used to shoot individual particles through the double slit and into photographic foil.

So shooting individual electrons through a double slit they found that the wave function collapsed again only at observation (i.e. the foil)... and after a good length of time for the electrons to "pepper" the foil there was a diffraction pattern leading to the conclusion that the electron must have interfered with itself when passing through the double slit. This was the confirmation that many people use to accept the wave (probability) functions. The electron existed simultaneously in both slits at the same time and the function only collapsed when the position was recorded at the foil.

Now they took it one step further wanting to confirm the results. Placing detectors at each slit to determine whether it went through one or both slits. Again confirming the wave function collapse at observation, the detectors recorded which slit the electrons went through, but this time there was no diffraction pattern on the foil.

The conclusion holds up the interpretation that in reality particles exist in strange states (the 100% alive cat, 100% dead cat, and everything in between)... at least until we try to pin 'em down.

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#29
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Re: Schroedinger's Cat -- Again

11/05/2010 6:13 PM

I had a class that discussed this at length... nearly ad nauseam. The broader principle that is IMO more important here is that even in the most intelligent and clever design experiments (in regards to particle physics), there really is no such thing as an objective observer... as a scientist observing things it will be subjective, because simply looking at the experiment alters it.

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#6

Re: Schroedinger's Cat -- Again

11/04/2010 10:52 PM

What's all the fuss about. It's just a flippin cat.

Besides you'll have to duplicate the experiment 9 times to prove anything.

And by then the razor will be dull anyway.

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#9
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Re: Schroedinger's Cat -- Again

11/05/2010 12:05 AM

Surprised you replied to this until I read your reply.

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#19
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Re: Schroedinger's Cat -- Again

11/05/2010 10:50 AM

"Concurred " .

Never took part in any "LSD parties" (or anything of the like), which is where such discussions belong...

Schro himself wrote: "One can even set up quite ridiculous cases. A cat is penned up in a steel chamber, along with the following device..." *Exactly!!!* Ridiculous!

Whereas Heisenberg did a pretty good job defining ('his') conundrum , Schro dragged discussion into the proverbial 'terlet'.

Too many semantics-puzzles with this poor analogy.

No cat will ever exist in the same box both 'alive' and 'dead', nor can it be "neither".

Nor does the act of observing to see WHICH state it is in "seal the cats fate".

The state of the cat is what it is irrespective of our observation.

The only thing that our observation changes is OUR understanding of the 'truth'.

The only 'truth' you'll find playing-with-cats is that human skin is no match for claws

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Re: Schroedinger's Cat -- Again

11/04/2010 11:38 PM

If this boxed cat falls over (in a forest) will it make a sound? ffej

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#8

Re: Schroedinger's Cat -- Again

11/04/2010 11:54 PM

I haven't studied this adequately, but I doubt that observation (especially "conscious" observation) is really what matters--unless "observation" is defined so loosely as to include all physical interactions.

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#10

Re: Schroedinger's Cat -- Again

11/05/2010 1:51 AM

There was an experiment not long ago, I believe at MIT, but my memory may be failing me. This experiment had to do with actually generating interference patterns using particles with measurable mass (I believe the particle stream was sodium ions, but again, we all know that the second thing to go is the memory). Essentially, one of the outcomes of this experiment apparently demonstrated that it is not the observation of the cat that makes the difference, but rather a modification to the environment that makes observation possible that determines the fate of the cat. In other words, the fate of the cat is determined when the box is opened, whether there is an observer present to witness it or not. So long as you don't open the box, the cat can continue to exist in two states...

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#11
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Re: Schroedinger's Cat -- Again

11/05/2010 2:48 AM
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Re: Schroedinger's Cat -- Again

11/05/2010 4:18 AM
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#33
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Re: Schroedinger's Cat -- Again

11/11/2010 4:47 AM

I'm not here, unless you read this.
Del

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#35
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Re: Schroedinger's Cat -- Again

11/11/2010 3:00 PM

Any changes to report?

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#12
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Re: Schroedinger's Cat -- Again

11/05/2010 4:04 AM

Hen before the egg?

Frog in a well?

Cat in a box?

Time before light?

An experiment before result? (?tluser erofeb tnemirepxe)

Would not other dimensions come into play?

Conundrums are dealt with but hardly ever solved.

the cat can continue to exist in two states... (and forever.) Who's counting?

Ky.

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#14
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Re: Schroedinger's Cat -- Again

11/05/2010 4:56 AM

Ok, here's another twist to the plot:Assume the cat is in a glass box,but no one is around to observe for at least one light year distance.An observer, with a very powerful telescope one light year away sees the status of the box,(and hence, the state of decay).Does the effect of observation occur immediatley, or will it take another year for the results to occur at the box? (just love twisting that cat's tail ).

Seems like this is a case of spooky action to me.

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#16
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Re: Schroedinger's Cat -- Again

11/05/2010 6:54 AM

Being 1 light year away and using a very powerful telescope ... you will still be looking at the event after 1 lightyear in time... the time it took the photons to reach your eye does not care about the size of your telescope... So back to square One.

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#28
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Re: Schroedinger's Cat -- Again

11/05/2010 5:59 PM

Obviously, I did not explain myself very well.The POINT I was making is that the status of the cat was NOT viewed for 1 year.The question was:Did the cat's status "solidify" when you viewed the event,or did it take another year for the information(That you viewed the event) to travel back to the box and collapse the probability into reality.If it happens as soon as you view it through the telescope, then the information about you viewing it traveled faster than light,(spooky action at a distance) otherwise, it would take another year for the information(that the status has been measured,or viewed) to reach the box and cat.

If on the other hand the information travels at the speed of light,it would actually take 2 years from the time the particle in the box decayed, (or not), to be known and collapse into reality.

See, simple question.

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#23
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Re: Schroedinger's Cat -- Again

11/05/2010 1:00 PM

I need to give my brain a break... maybe I'll go read Roger Pink's stuff again.

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#25
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Re: Schroedinger's Cat -- Again

11/05/2010 1:39 PM

You really are a glutton for punishment.

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#26
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Re: Schroedinger's Cat -- Again

11/05/2010 5:16 PM

"You really are a glutton for punishment."

Yup. As evidence I submit for your consideration: Married/divorced three times, and efforting a 'Chick Magnet' to attract yet another ex-Mrs. Doorman.

Maybe I am just a slow learner.

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#27
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Re: Schroedinger's Cat -- Again

11/05/2010 5:26 PM

Maybe it's time for LynDoor™ Industries to start a dating (not escort) service.

Then you could screen all the new applicants first.

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#15

Re: Schroedinger's Cat -- Again

11/05/2010 5:28 AM

Assume no one opens a thread, is it exisiting?

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#17

Re: Schroedinger's Cat -- Again

11/05/2010 8:15 AM

Has anyone ever considered what the wave function of a cat must look like?

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#18
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Re: Schroedinger's Cat -- Again

11/05/2010 10:20 AM

"Yes"...

see Feline Wave Function at mid-page...(< link)...

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#30
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Re: Schroedinger's Cat -- Again

11/06/2010 7:27 PM

Actually,there are 9 wave functions for a cat,one for each life.

Curiosity killed the cat, but I was interrogated at length about it.

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#20

Re: Schroedinger's Cat -- Again

11/05/2010 11:02 AM

Did Michelangelo create the "David", or did he merely chip away the marble that was surrounding the existing statue?

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#22

Re: Schroedinger's Cat -- Again

11/05/2010 12:10 PM

Oh, and one more thing. You don't need the camera to know if the cat is dead. The stench will indicate the state of the cat.

This is silly, at least to my simple mind.

Cheers.

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#24
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Re: Schroedinger's Cat -- Again

11/05/2010 1:02 PM

I agree with lynch because an event is not observed doesn't mean it didn't happen or it wouldn't have happened because it wasn't observed it is what you believe it to be in your minds eye thats the reality.Iam realy glad I only took one hit of acid when I was growing up.

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#31

Re: Schroedinger's Cat -- Again

11/06/2010 8:39 PM

The observation doesn't seem to need to be by a sentient being as shown in one of my previous threads.

I have a question for you: "If a man speaks in the forest where no woman can hear, is he still wrong?"

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#32
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Re: Schroedinger's Cat -- Again

11/07/2010 6:44 AM

StandardsGuy wrote: "The observation doesn't seem to need to be by a sentient being as shown in one of my previous threads."

I just want to echo and reinforce this statement. In the reading I've been doing lately (on the general subjects of relativity and advanced physics), I finally found an explanation of the Heisenberg (sp?) Uncertainty Principle (HUP) that seemed to make some sense to me at an intuitive level.

That understanding is this (and I forget, atm, where I found this explanation, but I suspect it was on wikipedia) (and I'm paraphrasing (from memory) and perhaps extending what I read):

  • to observe something, it must emit or reflect light
  • light consists of one or more photons
  • photons carry energy / momentum
  • thus, when an observation occurs, photons must be emitted from or reflected by what is being observed, which results in some amount of energy (momentum) being transferred
  • with specific reference to the HUP, this means that an observation imparts a change in momentum, which is either a change in position or velocity, which leads to the uncertainty
  • further, I extrapolate (not quite the word I want--theorize, or maybe "my understanding / guess is") that the result of the observation (the photon traveling back to the observer) cannot know the exact effect it has on the observed particle

Similarly, I can extrapolate (again, not quite the word I want--see previous note), that this impartation of energy serves to collapse the (probablility) wave function of the particle (not the cat) under observation.

With this understanding (and other comments made in this thread--like the one by ChaoticIntellect reminding us that "the original experiment is about radioactive decay" (the cat's life was determined not by the observation, but by the results of the observation on the radioactive decay of the (elementary?) particle being observed, I can make sense of all the seeming anomalies presented in this thread. (Or, at least I think I can ;-)

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#34
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Re: Schroedinger's Cat -- Again

11/11/2010 4:50 AM

"If a man speaks in the forest where no woman can hear, is he still wrong?"
RAOFPMSL
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#36

Re: Schroedinger's Cat -- Again

11/19/2010 11:36 AM

As the theory has been explained to me, it is more about a kind of 'superposition'. A particle can only be in one place at a given moment of time, so set up an experiment with an expected result. Using the '2-slit' experiment, we can close off one of the slits, and since there is only one slit left, that is where we will "observe" a particle. Now open the previously closed slit, (and close off the other previously opened one), and you still "observe" a particle at the open slit. With both slits open, the probability of "observing" at either slit is described by the wave function of the particle. The wave function exists both before the slits AND AFTER travelling through the slits. The wave function collapsed only to travel through one or the other slits as a particle, but the wave function sort of 're-integrated' itself on the output side of the slits. Think of the slits as individual observers if you must.

I hope this helps, but it really seem to be a really hard concept to grasp in our macroscopic world.

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