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Is it theoretically possible to send messages into the past using a quantum channel?

Sounds implausible at first doesn't it? Here is how it might theoretically be possible. Can you prove me wrong?

Stephen Hawkings agrees it is theoreticaly possible to travel into the future by accelerating a person or object to near the speed of light. Travelling to the past however does not seem possible so that person would be permanently in the future. They would also be unable to communicate with us using current technology snce that would involve sending something into the pas which is theoretically implausible.

Here is where spooky physics might help us. When two particles are entangled and the properties of one changes the properties of the second particle change identically and instantaneously even if the particles are spatially separated. Experiments have already shown this to be true. Assume someone were to invent a pair of linked quantum channel devices. Now send one of the devices into the future just like Staphen Hawkings suggests. If the particles remain entangled would be then be able to have two way communications with someone from the future?

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  • Asked by FullJ
  • on 2010-05-20 12:57:20
  • Member status
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Categories: Technology.

Tags: relativity, Timetravel, entanglement, QuantumSpin, quantumphysics, communications, SpookyPhysics, teleportation, quantumchannel.

 

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FullJ says:

I'll answer this for myself. No it is not possible because although the spaceship moving at a speed nearing the speed of light is moving into the future quicker from our perspective it will never leave the present. Any changes made to the spin of the entangled particle will cause a change in the relevant time period of it's perspective. In other words if it travels 10 years into the future then any changes to that particle will cause a change in its entangled partner ten years in the future.

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Tags: relativity, Timetravel, entanglement, QuantumSpin, quantumphysics, communications, SpookyPhysics, teleportation, quantumchannel.

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posted on 2010-05-21 13:20:49 | Report abuse


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