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Transferring information at faster than the speed of light using time and quantum mechanics?

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Transferring information at faster than the speed of light using time and quantum mechanics?

Postby hackett » Sat Oct 29, 2011 12:20 am

I think I've found a way to transfer information at faster speeds than the speed of light allows, so tell me what you think and whether or not you think it's possible to implement.

So I read about this science experiment awhile back and apparently physicists were able to transfer random data at faster than light speeds using a property of quantum mechanics. Since this was completely random "data" and didn't technically transfer information it didn't conflict with the laws of physics and all was well, and there was even talk about using it for private key encryption.

If this is incorrect then stop reading here and give me a link explaining it better.

If you're still reading, then I've thought of a way to use this for faster than light information transfer. Let's say Company ABC has a random quantum communicator as described above, and they want to transfer financial data to Bank XYZ. Since they couldn't control the content of the information, couldn't they instead control the timing of random data transferrence? Similar to Morse code, they could use, say, a 1 billionth of a second pause for a binary 0 and a 2 billionth of a second pause for a binary 1. Even though they're still technically not transferring information, Bank XYZ could still look at the timestamps of the random data transfers and infer information from that, couldn't they?

This would allow them to transfer data at faster speeds than allowed by light, although not technically transferring information (unless time is considered information, in which case I'd still be curious if this was possible). This is of course given that the binary pauses used are shorter periods of time than it takes for light to travel from point A to point B.
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Transferring information at faster than the speed of light using time and quantum mechanics?

Postby sampson » Sat Oct 29, 2011 12:36 am

I'm afraid you are using an underlying system that does transfer information. If scientists say it doesn't transfer information, they mean this very literally.

Something faster than that speed of light that does not transfer information is for instance the spot on a wall created by a far away lighthouse spinning very fast. The spot moves faster than the speed of light. There is no way that you can alter the appearance of the spot at moment B by doing something with the spot at moment A. You would have to be at the lighthouse, not at the spot.

The same is true for the above problem. If the system does not transfer information, that also includes the timing information.

elaboration:
The lighthouse analogy describes another system where something seems to move very fast (the spot on the wall) but where no information travels with it. An observer that is at the location of the spot at one moment could alter that spot. He could hold a filter in front of it changing its color, he could hold a lens in front of it changing its position, but whatever he does, it will change nothing about the spots appearance at another location and another time.

The same is true for the quantum entanglement. The observing of the particle A does not send any information, whatsoever, to particle B. No timing information, no position information, not even the information that it was observed.

This may seem counter-intuitive, since it seems to violate the Heisenberg uncertainty principle.
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Transferring information at faster than the speed of light using time and quantum mechanics?

Postby joachim » Sat Oct 29, 2011 12:41 am

What you were describing is the quantum idea of quantum entanglement. It isnt really "random" as you suggested. If you know anything about positrons, you know that they spin in random pattern (so you were partially right, in a sense). So with quantum entanglement, you entangle two positrons (I cant even fathom the actual theory behind doing this properly), and then think of it like a system with no net force or momentum. For a system that has no net momentum, with two objects, they have to be moving the same speed, and the same mass, but in exactly opposite directions. This is sort of the way to think about quantum engagement. One positron would be doing random movements, but the other one would be doing the exact opposite of the positron its entangled with at the exact same moment. So I didn't really understand what you were talking about when it came to pausing a postitron (this would be like pausing time {subnote: you talked about if time is considered information. You would not believe the debates physicsts have about if time even actually exists}) but if you were able take a positron, entangle it with another positron, and make it move in a way that you want it to ( and make the movements meaningful) then, you could transfer data by this means.
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