yes the cat experiment was just a thought experiment, but other experiments have been done that prove atleast as much as anything can be proved that the assumptions are correct. Like the two slits experiment, where a single wavelength of light is shined at two slits, thus producing a pattern similar to a bar code on a wall behind the slits, even when a single photon of light is passed thru the slits the same patter of interferance appears which means that the single photon passed thru both slits at the same time, now if you were to put cameras at each slit and do the experiment again, the cameras would only record the photon going thru one slit or the other, not both. so the way u observe changes the outcome of the experiment, creating one reality verses another in a sense. if u look at the wall then the photon went thru both slits at once and made the pattern if u look at the slits it goes thru one or the other and no patter on the wall shows up. it somehow knows that you are looking at it.
When u look at the wall the photon is in a state of quantum superposition as it passes thru the slots, allowing it for lack of a better description to be in two places at once, but when u look at the slits the wave function is collapsed at that point and it only goes thru one or the other, not both. Also it works the same way with matter, as it does with energy. So it seems that everything exist everywhere and at all times, in virtual sense, till its observed, collapsing the wave funtion and making one of the virtual possibilies real, or real to us that is. But if mathmatically the virtual is just as real, as what we call the real, then is there some ultimate observer that keeps things real even when we arent looking? Its even been suggested that the entire universe existed in a state of superposition until a consious entity made the first observation and made it real. But does it stay real when it isnt observed? has the whole universe been made real, or just the parts that were observed? And again what happens to all the virtual but equally real possibilities that weren't observed. Do the occure in other universes, or remain virtual, or are they just gone?
One of the more disturbing implications of quantum theory is that if you arent looking then you cant have any idea what is happening. And then when u do look, whatever does happen is atleast in part a result of how, or when you looked. The math says the virtual possibilities are as real as the real observed outcomes, but for us only the one observed is considered real, and no one is sure what really happens to the other virtual ones.
As far as actually creating particles by looking for them, that is speculation, but the experiments back up the conclusion, though that may not actually be how things are, it does fit with the observations. If this is what actually is happening, then that basically might mean that we actually create reality by observing reality, and how, and where and when we look effects the outcome thus shaping the reality. Now what is unsure is what happens to all those other potential realities, are they realized in another universe, or do the remain virtual, yet now less real, except for the fact that they arent observed, we just arent sure. damn repeated myself ;(
The standard copenhagen interpretation has not been discredited, though alternate possibilities have been put forward or improvements made. The problem is that most of them build on the copenhagen interpretation or include it, or they basically make the same predictions, they just go about it in a different way. So we are left with several possible explanations that all basically predict the same or similar things and they are still trying to test them, or find ways to test some that are difficult to test. There is no definative word on exactly what theory is best, or right, or even if any of them are. We have several alternatives to the copenhagen... superstring, supersymetry, multiverse, holographic, and even more variations on those, actually some of those may be aspects of some of the other ones and not seperate theories, i cant remember right off hand.
Personally i think all possible paths are realized in some kind of multiverse, or that in reality all of them coexist here, are all equally real, and are just aspects of some ultimate reality that we can barely scratch the surface of. Because we cannot percieve the system as a whole, because we are just one aspect of that system and within it, we can only percieve so much of it at once. So to us there appears to be a flow of time, motion, an unfolding of events that follows 1 path out of all the possible paths. But in reality thats an illusion or at best part of the truth but not the whole truth, and that in fact everything is just an aspect of one ultimate thing, and that thing just IS and that thing is all there IS.
There is no actual unfolding of anything, its just that our limited perception only allows us to experience a limited portion, or aspect of the whole at any given moment, thus giving us a very distorted or imcomplete experience of reality. Basically i envision reality as probably being like one giant ocean, and we and everything we experience are just waves or currents in/on that ocean, but its all still just ocean, and ocean is all there is. Within the system u see the waves and currents. They come and they go, or they change or blend together or seperate, but if you could escape the system and look down from far enough away all you would see is ocean, the waves and currents wouldnt even be visable, just ocean, but even if they were visable, waves and currents are not seperate from the ocean, they are aspects of the ocean, but its all still ocean. But u cant escape and look down, because there is nowhere to go, the ocean is everywhere and the ocean is all there is. Its the only thing that is, or its nothing and nothing is all there is, really the two are equal. What is the difference between nothing and something if there is only nothingness and no something...or if there is only something and no nothingness. Whatever u call it, either way... it just is, and it is all there is.
Some good books are The search for shrodingers cat, brief history of time, tao of physics, the mind of god by paul davies, lots more good ones too.
|