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View Full Version : Faster than light
Crunchy Cat 11-27-05, 05:59 PM Take two entagled particles, spread them across a lightyear's distance, and change the direction of either one. The result... the other one follows instantaneously.
The significance of this is that the information travelled a huge distance far faster than light ever could. Any ideas on how this is accomplished or even if my interpetation is correct?
Quantum Quack 11-27-05, 07:40 PM Take two entagled particles, spread them across a lightyear's distance, and change the direction of either one. The result... the other one follows instantaneously.
The significance of this is that the information travelled a huge distance far faster than light ever could. Any ideas on how this is accomplished or even if my interpetation is correct?
I have but unfortunately it's a bugger to prove.
The information isn't actually travelling so therefore can't really be seen as FTL. From our 4 dimensional perspective it appears to be faster than light. But from a zero dimensional perspective distance is irrelevant.
It could be postulated that inertia is fundamentally a zero dimensional effect, but damn hard to prove.
It means that essentially the two particles are touching even though they are light years apart. Not touching externally but touching internally.
Can be simply described using this diagram:
<img src=http://www.ozziesnaps.com/Ozziewebworkings/higs.gif>
Any way my thoughts only and at present just speculation and hypothesis.
It also ties in with studies into parapsychology, but I shall leave that to that forum.
James R 11-27-05, 08:47 PM Technically, most physicists don't regard the process as a transfer of information. You can't use quantum entanglement by itself to transmit any kind of useful signal faster than the speed of light. So, arguably, no information is carried by the entanglement. Instead, there is only a correlation between the entangled particles.
Quantum Quack 11-27-05, 09:08 PM Say you have one of the particles in a room next to a Hi fi speaker system, the other particle is 1 ly away it's ambience is not important.
You are playing music which causes your particle to vibrate and resonate to the music.
The other particle 1 ly away mimics instantaneously the particle in the room's vibrations.
Is this considered an situation of information transfer technically?
My take:
In one sense it isn't a transfer because distance is zero. So the information is already there, Transfer implies a delay but if the transfer is instantaneous then there is no time to transfer anything yet logically the two particles would vibrate exactly the same. From an observers perspective it would appear that information has been transfered but this is not actually the case.
quadraphonics 11-27-05, 09:35 PM You are playing music which causes your particle to vibrate and resonate to the music.
The other particle 1 ly away mimics instantaneously the particle in the room's vibrations.
That's not how quantum antanglement works. If you disturb one of the particles (for example by applying a force to it), it will no longer be entangled with the other one. So your example is just wrong. What you CAN do is to MEASURE the angular momentum of one particle, and you will then know the angular momentum of the other as well. But you can't CHANGE the angular momentum of one particle and then assume that the other one has also been altered. This is why you can't use entanglement to transmit information; you can effecitvely measure things that are very far away, but you can't affect them in any way.
Quantum Quack 11-27-05, 09:41 PM That's not how quantum antanglement works. If you disturb one of the particles (for example by applying a force to it), it will no longer be entangled with the other one. So your example is just wrong. What you CAN do is to MEASURE the angular momentum of one particle, and you will then know the angular momentum of the other as well. But you can't CHANGE the angular momentum of one particle and then assume that the other one has also been altered. This is why you can't use entanglement to transmit information; you can effecitvely measure things that are very far away, but you can't affect them in any way.
Ahh!! I see your point. However if one can measure the angular momentum of a distant particle this is in self a pseudo information is it not?
Another interesting question comes up with:
If my particle is vibrating is it possible that somewhere in the universe there is another particle mimicing my particle? In a form of unknown or unknowable entanglement?
quadraphonics 11-27-05, 09:52 PM Ahh!! I see your point. However if one can measure the angular momentum of a distant particle this is in self a pseudo information is it not?
Sort of... it's an unresolved (but very real) phenomenon. And there are practical applications for it: you can generate identical random numbers in two different places, which can be useful for cryptography. The important thing to keep in mind is that it cannot be used to transmit information.
If my particle is vibrating is it possible that somewhere in the universe there is another particle mimicing my particle? In a form of unknown or unknowable entanglement?
Sure, but that's sort of out of the realm of physics, since there's no way to ever know... it's also been hypothesized that the entire universe is entangled, since all particles were very close together around the big bang...
Quantum Quack 11-27-05, 09:59 PM One thing I would like to know is whether this pheno proves or has the potential to prove the existance of zero dimensions?
In that the distance between particles is zero?
On the face of it it appears that it does.
And whilst this doesn't necessarilly compromise or negate Special relativity it certainly seems to complicate things.
MetaKron 11-27-05, 10:36 PM So I wonder if tangled subatomic particles can be made permanent parts of atoms, so if you want to communicate long distances instantaneously, you just use a pair of semiconductor chips containing entangled atoms.
I am fuzzy on how entanglement works. how do you know that the entangled property of the particle has not already been decided upon their creation (the moment they became entangled). I understand that there is no evidence for "hidden variable", but I am not sure how they can be completely ruled out.
anyway, (WARNING: HYPOTHESES WITH NO BASIS) perhaps the information travels outside our time, parallel, but not in, our "universe" . just a thought.
Crunchy Cat 11-28-05, 01:21 AM Technically, most physicists don't regard the process as a transfer of information. You can't use quantum entanglement by itself to transmit any kind of useful signal faster than the speed of light. So, arguably, no information is carried by the entanglement. Instead, there is only a correlation between the entangled particles.
I understand, and this indicates that my original interpretation is incorrect. I wonder why the correlation exists?... and I suspect that is a big question pending investigation as well.
Entanglement and the Feynman double slit jumps out at me as having some underlying, bizarre, common link that can be held responsible for the oddities going on here, do you think?
I’m wondering whether every single particle / energy field within our universe could be wavelike in structure and that these waves could in fact develop in many different ways and thus interact in very different ways, thus creating everything we observe. Perhaps they could form standing waves and this could create the illusion of mass. I’m thinking a lot about standing waves and mass at present.
I’m pondering over the thought that an electron is not what we think it is.
Is it possible that an electron is nothing more than a wave that emanates from a point and spreads out just as a wave would, but the clever bit here is that there is a link between ALL points on the circumference of the wave as it moves outwards. When viewed from a particular point, and in a particular way, the wave collapses at THAT point and all other existences of the wave cease along the outer edge of the travelling wave.
Perhaps entanglement is a variation of the same theme, such that there IS a direct link around the outer edge of the propagating wave.
Perhaps the collapse or behaviour of waves is instantaneous around the circumference of the leading edge of the wave.
Does anybody see where I’m coming from?
Well I can see what you mean. Dont know where you are coming from, though :P
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