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When both the machine and scientist "knows" (i.e. it polarises the photon to see which slit it went through) the interference pattern collapses. When the machine "knows" but the scientist doesn't (the 2nd rotation happens), the interference pattern returns.
Originally posted by Astyanax
The experimental results can be explained in many different ways. Here are a few of them:
- Information travelled back in time from Victor to Alice and Bob, changing the photons' spin to match what was done to them later in time (this is your interpretation, I believe);
- The information only became specific when somebody looked at the results – before that it was kind of fuzzy and could have had any values at all, but when somebody looked at it, what that person already knew somehow forced the information to have certain values (this seems to be your New Age friend's interpretation);
- Only particles that have the right spin states initially are capable of becoming entangled (this seems quite possible to me, though it suggests a hidden variable of some kind and thus goes against quantum dogma);
- The probability function, constrained to have certain values at one point in space, automatically and instantaneously acquires different values or value ranges at other points.
The last is the standard quantum interpretation. It is agnostic about what is happening in time.
As always with entanglement, it's important to note that no information is passing between Alice, Bob, and Victor: the settings on the detectors and the BiSA are set independently, and there's no way to communicate faster than the speed of light. Nevertheless, this experiment provides a realization of one of the fundamental paradoxes of quantum mechanics: that measurements taken at different points in space and time appear to affect each other, even though there is no mechanism that allows information to travel between them.
The picture certainly looks like future events influence the past, a view any right-minded physicist would reject. The authors conclude with some strong statements about the nature of physical reality that I'm not willing to delve into (the nature of physical reality is a bit above my pay grade).
First of all, thank you for your objectively formulated answers.
I`m enjoying it too to talk with you about physics, I think you`re more educated than me in that stuff and so I`m learning from you.
I wished to give you some links, especially one at Wikipedia about the many possibilities how to explain why quantum information works the way it does, and a second one about the time to be looked at, quantum particles are acting in, in relation to our physical every-day-world.
There is nothing written about the velocity of light as a working factor within experiments with photons. But I think this could perhaps be one of many unknown variables.
About the right-spin-states as working factor I don`t know anything and it would be interesting to learn about that, could you please explain?
I think there are many hidden variables that need to be gained some knowledge about.
First of all, thank you for your objectively formulated answers. I`m enjoying it too to talk with you about physics, I think you`re more educated than me in that stuff and so I`m learning from you.
1. Information travelled back in time from Victor to Alice and Bob, changing the photons' spin to match what was done to them later in time (this is your interpretation, I believe);
the settings on the detectors and the BiSA are set independently, and there's no way to communicate faster than the speed of light.
there is no mechanism that allows information to travel between them.
3. Only particles that have the right spin states initially are capable of becoming entangled (this seems quite possible to me, though it suggests a hidden variable of some kind and thus goes against quantum dogma);
there is no mechanism that allows information to travel between them.
4. The probability function, constrained to have certain values at one point in space, automatically and instantaneously acquires different values or value ranges at other points.
there is no mechanism that allows information to travel between them.
The experimental results can be explained in many different ways. Here are a few of them:
The information only became specific when somebody looked at the results – before that it was kind of fuzzy and could have had any values at all, but when somebody looked at it, what that person already knew somehow forced the information to have certain values (this seems to be your New Age friend's interpretation);
Are there any physical phenomena that suggest the existence of hidden variables? Variables are physical properties. Which physical properties do you believe are not described by the equations of quantum mechanics?
Dirac's criticism was the most persistent.[2] As late as 1975, he was saying:[3]
Most physicists are very satisfied with the situation. They say: 'Quantum electrodynamics is a good theory and we do not have to worry about it any more.' I must say that I am very dissatisfied with the situation, because this so-called 'good theory' does involve neglecting infinities which appear in its equations, neglecting them in an arbitrary way. This is just not sensible mathematics. Sensible mathematics involves neglecting a quantity when it is small - not neglecting it just because it is infinitely great and you do not want it!
Another important critic was Feynman. Despite his crucial role in the development of quantum electrodynamics, he wrote the following in 1985:[4]
The shell game that we play ... is technically called 'renormalization'. But no matter how clever the word, it is still what I would call a dippy process! Having to resort to such hocus-pocus has prevented us from proving that the theory of quantum electrodynamics is mathematically self-consistent. It's surprising that the theory still hasn't been proved self-consistent one way or the other by now; I suspect that renormalization is not mathematically legitimate.
Originally posted by aborigineeIf we have a spirit, and I think we have, then our spirit is something like "entangled" with our body, especially our brain, and therefore information from the spirit can reach quantum-particles in our brain and our brain is used by our spirit somehow as a computer.
But our spirit can only interact through this "computer" into our physical reality, if there`s a malfunction in our brain, we can see how boardered we get.
Indefinite results in equations show that something doesn`t match to reality.
I`ve read about that in Stephen Hawking`s book "The grand design", which I only have in the German translation. Therefore I can`t give any citations or ISBN number.
If we have a spirit, and I think we have, then our spirit is something like "entangled" with our body, especially our brain, and therefore information from the spirit can reach quantum-particles in our brain and our brain is used by our spirit somehow as a computer.
And physicists should look at fundamental yet unsolved mysteries more practically. It`s for example far away from reality to regard entangled particles being far away from each other as being only one particle - there`s space in between them. And the question remains - how is information "moving" inbetween them without needing space and time?
Well, you are entitled to your opinion. These things seem impractical or unreal to you because you are still clinging to the model of reality created by your brain from the information received by your sense organs. In that model, time only flows one way and objects separated in space and time cannot act in concordance without information passing between them.
But these things are only the way you, as a living animal, have evolved to process and interpret the world around you. In reality the world is nothing like that. It is something we cannot see and do not understand. Through science, we learn something about what the world might really be like, but neither science (nor, indeed, spirituality) can ever give us the full answer. That almost certainly lies beyond us; it may not, in fact, exist at all. I prefer not to comfort myself with superstitious fabrications,
how is information "moving" inbetween them without needing space and time?
But these things are only the way you, as a living animal, have evolved to process and interpret the world around you. In reality the world is nothing like that.
I won't say this again. I stopped reading your posts pages and pages ago. You have nothing to say that I have not heard dozens of times before from people who have more subject knowledge, better writing skills and a better command of English than yourself.
Clearly nobody else is talking to you either; the last time anyone on this thread replied to one of your posts was the 7th of May, five whole days ago, and that post ended with the poster saying he wasn't interested in talking to you any more.
You have nothing of substance to contribute to the discussion of a subject you know nothing about.
Everybody is ignoring you. Why are you still here?
In real life, do you enjoy gatecrashing parties and annoying the invited guests?
Originally posted by Cecilofs
I like this idea
Kind of like our bodies are actually remote-controlled from a different dimension.
What's that saying? "We are not physical entities having a spiritual experience, but spiritual beings having a physical experience"
Heisenberg wrote: “The first gulp from the glass of natural sciences will turn you into an atheist, but at the bottom of the glass God is waiting for you.”
Initially viewed as a suspicious provisional procedure by some of its originators, renormalization eventually was embraced as an important and self-consistent tool in several fields of physics and mathematics. Source
scientists should be honest enough to state, that there can`t be found any evidence for the existence of god nor for his non-existence.
The universe is not obliged to conform to our prejudices –
there are are there watcher? that have a watch
Originally posted by scarystuff
As if entangled particles and spooky action at a distance is not already weird enough, it now turns out they can see the future also!
Article on Ars technica
I don't know what to say other than the universe will never stop to amaze me
Maybe this will lead to some way to predict the future and also to explain how some people say they can already see what is going to happen (although they are mostly wrong).
en.wikipedia.org...
Re Quantum physics.
You are all being fooled by language. What is a quantum? It is an indivisible state. A discrete.. something. It can be an 'energy level' or a 'spin' (whatever that is). You all think quanta are something magical. Let me disabuse you.
Notes on a piano are quantised frequencies that form a harmonic scale. Each note has a discrete value, The frequencies are determined by harmonic relationships.
Take a single string. There are harmonics, and you can find them by simply damping the string in the correct place. Plenty guitarists here know that. These harmonics are 'quantised' too.
Take charge. Charge is quantised into positive and negative, depending on whether an ion (say) has a surfiet or deficit of electrons.
Quantum is everywhere - the number of apples on a tree is quantized
As for the weird stuff - that's all ..............................Text