All Questions
Tagged with faster-than-light information
34
questions
-4
votes
1
answer
82
views
Transmitting Data faster than the speed of light using entangled particles [duplicate]
If we have a pair of super-asymmetrical entangled particles, and move them a light year away so that they retain their quantum entanglement, and we set a clockwise spin (or vertical polarization) as 0 ...
- 11
0
votes
1
answer
52
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Do superluminal shadows drop the local temperature on distant objects?
There are lots of examples online of the scenario of someone with sufficient machinery casting a shadow of their thumb on the moon. It's argued the shadow travels faster than light, instantaneously ...
- 31
0
votes
0
answers
68
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About information transmission speed [duplicate]
Einstein says information cannot be transmitted faster than light.
Say I set an alarm that ring at 9:00 am. I go to school, and wait until 9:00 am. Then I tell my friends that my alarm rang. If the ...
- 49
8
votes
1
answer
565
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Could information be transferred through a wormhole?
There was a paper published recently about the possibility of sending messages through a wormhole,see reference here. It has also been speculated that any entangled pair of particles—even particles ...
- 1,001
0
votes
0
answers
25
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Communication via entanglement [duplicate]
For years now i have in my haed a thought experiment for information exchange via quantum entanglement. And i am aware that something must be wrong with it but i can't figure out what it is.
The ...
- 1
0
votes
1
answer
107
views
Faster than light communication by entangled photons [duplicate]
Faster than light communication is not possible. If I measure the polarization of an entangled photon and it turns out to be right circularly polarized. In that instant, dont I know that someone ...
3
votes
1
answer
107
views
Nonlocality of a bug on movie screen
I am currently learning quantum mechanics using Griffiths. In the appendix, he goes to talk about EPR and Bell's inequality, and that experimental verification of Bell's inequality rejects the "...
6
votes
4
answers
2k
views
Faster than light information
I've seen there are a few answers on here previously about faster than light information travel, and my understanding is that it is impossible.
However, I've just read an article https://www....
- 63
1
vote
1
answer
117
views
Example of information travelling faster than the speed of light?
In the following situation, information seems to travel faster than the speed of light. Is there a mistake in my reasoning?
Suppose we have an electric circuit. For times $t<0$, there is no current ...
- 1,440
7
votes
4
answers
1k
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Could the speed of causality be (significantly) faster than $c$?
The other day my son (13) asked me whether it was possible that light went very slightly slower than our best measured $c$, and at the same time had a very tiny mass, but we aren't able to measure ...
- 209
-3
votes
2
answers
161
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Does "Superluminal travel of non-information" means we already "achieved" superluminal speeds?
From what I understood of Vsauce video talking about "Superluminal travel of non-information," the absence of information seems to travel faster than the speed of light, since we perceive ...
- 277
15
votes
4
answers
3k
views
Contradictions caused by moving faster than light
There was a Joe Rogan episode with Brian Greene where Joe thinks aliens are watching us because the universe is infinite and there are an infinite number of them. So some of them must be watching.
...
- 885
2
votes
2
answers
334
views
Proof for impossibility of FTL Signals
Is there is formal proof for the fact that signals must always travel at a speed less than the speed of light in a vacuum?
I understand that special relativity dictates that for massive particles to ...
- 173
1
vote
2
answers
71
views
Moving a 2x2 the length of the solar system [duplicate]
If we were able to push a 2x2 piece of wood that is the length of our solar system, how would it behave? My colleague says since its all part of the same molecular structure, the whole piece of wood ...
- 11
0
votes
0
answers
47
views
Speed of light vs Tug of war [duplicate]
Suppose there's a "theoretical rope" that's 299 792 459 meters long in empty space.
The speed of light is 299 792 458 m/s.
Is it possible that if the rope is "tugged" on one end, ...
- 173