/sci/ - Science & Math

>>5732194
>cockhead.png
>sfw board

What do you mean? Once one of the entangled particles crosses the horizon there's no way to measure its state. So whatever we measure its correlating particle's state to be in (spin up for example) we can only assume by angular momentum conservation that the other particle is in the opposite state (in this case spin down). But there's no way to experimentally verify this, so the point is moot.

>Time is stopped for one side... does it stop for the other?
Also, I'm not sure what you mean by this. Time certainly doesn't "stop" for the particle when it crosses the horizon, and once it reaches the singularity current physics has no idea what happens to it. So again, I have no idea what you're asking.

Entanglement doesn't mean what you think it means. It means you can't figure out what the particles do by describing each particle with its own separate wavefunction. It doesn't mean that anything that happens to one magically happens to the other.

>>5732247
>>5732247
yea? http://www.nature.com/news/quantum-teleportation-achieved-over-record-distances-1.11163

>>5733183
Look, heres the thing.
Yes, the quantum teleportation is instantaneous.
The measurement methods are slower than c.
Particles have to be created in sets, in one location, then moved to another to be teleported. They have to have been at the same place at one point.
We can only teleport one quantum state at a time. When record numbers are achieves it is the same experiment performed in series.
The measurement of each state destroys it. Therefore there are a finite number of teleportations before the need to return to the original laboratory to create more entangled groups.

>>5733183
I'm not sure what you think that proves.

>>5733211
>Yes, the quantum teleportation is instantaneous.
What? No, it isn't. Quantum teleportation requires a classical channel carrying two bits per qubit.

>>5733254
No quantum teleportation requires a classical channel and free-space channel. The teleportation is the immediate transmission of the quantum state. The steps required to read the state are limited to c.

>>5733254
Only part of the transfer happens instantaneously, it has been experimentally measured as high as 10,000 times c.

>>5733254
Citation:
http://arxiv.org/pdf/1303.0614v1.pdf
http://www.nature.com/nphys/journal/v8/n12/full/nphys2460.html

>>5733264
>The teleportation is the immediate transmission of the quantum state.
Quantum teleportation is both.

>The steps required to read the state are limited to c.
Most of the time (3/4 of cases) you don't even have the original quantum state until the last step.

>>5733277
Those papers aren't about quantum teleportation. Quantum teleportation is not instantaneous. You need the classical channel or you do not get your original state back.

>>5733290
One part of the transfer involved in Quantum teleportation IS instantaneous. As i said, the steps required to take readings are classical.
>>5733282
Also, Quantum teleportation is assisted by the phenomenon of quantum entanglement which is a form of quantum superposition. Those papers are entirely relevant. They describe the FTL part of the transfer involved in quantum teleportation.

>>5732194
Time depends entirely on your spatial reference frame.

>>5733301
Just don't call quantum teleportation instantaneous because part of it arguably is. (The quantum part is more naturally understood as working backwards then forwards in time. There is no absolute "instantaneous.")

>As i said, the steps required to take readings are classical.
That's not an accurate description. The original state simply isn't there prior to receiving the classical information. You have a randomly chosen transformation of the original state which you have to transform back using the classical data. Making measurements on the state once you finally have it is an entirely separate thing.

>>5732194
OP this is mass in correlation with S.R.
Does everybody still think S.R. Only has one function?
>All particles are already in the BH
>yfw

>>5733337
Yes, that initial statement was inaccurate, as you can see i corrected it with my expansion.

Although, you are arguing about the current methods of quantum teleportation we have. Our version of quantum teleportation cannot be used for FTL travel.
Although in the end we are arguing about different interpretations of quantum mechanics so there is no real correct answer. The only thing the various interpretations agree on is that these FTL tricks cannot be used for FTL communication.
Although, recent studies such as those from last june that reinforce the idea that some quantum effects arise externally of space-time. It's something that is at the height of research at the moment. It's hard to draw any valid conclusion on what is and what is not possible at the moment.
In this case, you can only state that:
"Experimentally thus far, super-luminal communication has been unsuccessful, although recent studies have shown that Superluminal communication is possible via the violations of Bells theorem and exploiting non-locality, but only if the hidden influences are propagating at a finite speed outside of space-time"

I knew this was going to descend into MUH FTL.

>>5733384
If you want FTL communication, you have to discover a regime in which quantum mechanics is inaccurate and superseded by a more accurate theory, and you have to get lucky in that the more accurate theory allows FTL signalling (it may be just plain impossible). There's no indication of that happening anytime soon. All the experiments about entanglement are in agreement with the predictions of QM.

>>5733414
Agreed.

>>5733211
>Particles have to be created in sets, in one location, then moved to another to be teleported
so... if world started with a big bang... you know where I'm going..

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<span class="math"> \iint { \sin { x } dx } [/spoiler]