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Time Travel? Sort of

  1. Feb 17, 2016 #1
    So I was writing a short story and I came up with this scenario. Please pardon my Arrogance, but my theory uses several theories. I do have some sort of knowledge in Physics but here it goes.

    Could you, hypothetically transfer information in the form of gravitational waves between two entangled particles. If so, could you place Particle A at the even horizon of a black hole, i'm assuming time would stop for Particle A. The date and place Particle A was placed into the black hole would be a sort of check point. Some time in the future, you use Particle B to influence Particle A's spin which is believed to cause very small ripples in the gravitational field. Since we just detected gravitational waves not too long ago. Could you send data in a form of Morse code from Particle B (which is now in the future) to particle A (which is still stuck at that one moment in time), and observe the gravitational waves coming from Particle A? Thus sending data back in time creating a Time Loop?
  2. jcsd
  3. Feb 17, 2016 #2


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    Staff: Mentor

    If you have some magic rocket with a powerful acceleration and infinite fuel, you can get very close and hover there. Time won't stop, but it will pass slower for particle A. This just means its clock runs slower. Whatever A does in the future will be in the future.

    You cannot let A emit gravitational waves through the entanglement - actually, you cannot let A do anything measurable just from entanglement, and there is nothing special about gravitational waves.
    But even if you could, for outside observers the influence on A would happen at the time you try to send a message. Just with a "weird" clock reading for A, but not in the past.

    No, it does not work, for two independent reasons at the same time.
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