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Quantum Entanglement vs Space Time

  1. Nov 23, 2013 #1
    Hello Everyone.

    I will be honest with you guys, I dropped out of school at 13 years old and I have no formal qualifications and certainly know very little about Quantum Physics... However I like to "THINK" and this has what has brought me here.

    What I am about to ask could very easily make no sense and be a completely dumb question but I would appreciate if you try and open your minds to why a physics "noob" would ask such a question.

    So...

    The theory of Space Time says that our perception of time is different depending on the speed that we move though space and most importantly the speed and direction we move though space... Meaning that moving towards Earth lets say at great speed from a great distance the perspective of time at that would technically be far in the future.

    What I don't know however is that if Space Time effects Quantum Entanglement however in what I am about to propose I don't know if that is even relevant... Please understand I do not believe that what I am suggesting is even possible but as an idea it interest me.

    If we could Quantum Entangle 2 computers and then send one of these computers VERY far way at a very fast speed and Quantum Entanglement IS effected my space time... What would happen when one of the computers no longer exists in one of the computers NOW slices? Would the the Entanglement Stop? as I thought this was not thought to be possible...

    On a different perspective, We do the same experiment syncing the televised news between the two computers for years and years. Say it was possible to find a way to get the space computer millions of light years away. If we swung it fast back towards Earth to capture the news, then swing it back away from earth till you somehow find Sync would we be able to watch tommorows, next weeks or even next years news?

    Again...

    If this is as dumb as it sounds in my head I am sorry. I would just love to have ideas. I have tried to look on places like google but due to the fact Quantum Physics is such a hot topic its hard to find the stuff I am looking for.

    Kind Regards.
    Jamie.
     
  2. jcsd
  3. Nov 23, 2013 #2

    Drakkith

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    Staff: Mentor

    You're referring to the Theory of Special Relativity. It actually states that observers in motion relative to each other will view the other as experiencing time dilation. The direction isn't important, only the relative speed. To be clear, time dilation is the result of motion relative to another observe, not motion through space. Motion "through space" has no real meaning since there is no frame of reference that we can point to and say "That's the frame of all of space".

    I have no idea what this means.

    Let's use a simpler example instead. Let's say we have two entangled particles traveling away from each other. No matter how far apart they are they will always stay entangled until one of the particles is observed.
     
  4. Nov 23, 2013 #3

    So I assume that this is incorrect then?

    It attempts to explain "NOW SLICES".

    When you say you have no idea what I mean...
    I believed that the perceived passing of time was different depending on if the moving person/object is moving towards or away.

    Like I mentioned my ideas on this stuff are most likely completely messed up. However your simple example does not take into consideration what I was actually asking...

    IF perspective of time does change depending on the speed of objects moving like shown in Gravitational Time Dilation - http://en.wikipedia.org/wiki/Gravitational_time_dilation. In theory it would be possible to to get the quantum entangled particles to no longer be synced. So what would happen if you was able to get one of them particles so far de-synced that the other entangled particle no longer existed in that time?

    If nothing would happen because they are linked beyond the time dilation then surely it would be possible to send and receive data from "OUR" past, present and future?
     
    Last edited by a moderator: Sep 25, 2014
  5. Nov 23, 2013 #4

    zonde

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    Gold Member

    Idea of "now slices" is correct.

    It seems like you view quantum entanglement like a way to do instantaneous communication. Well, the thing about quantum entanglement is that it's of no use for any communication purposes except maybe for making it a bit more secure.
     
    Last edited by a moderator: Sep 25, 2014
  6. Nov 23, 2013 #5
    Sorry, I was under the idea that entangled particles where + and - and switching the state of one would instantly switch the state of the other... Surely this could be manipulated into some form of Morse Code?

    This is where I start to show how much of an Idiot I am I assume?

    In fact using my understanding (likely wrong) I thought it would be possible to have IN THEORY billions of entangled particles with the ability to remote control something / communicate with something instantly with 100% accuracy.
     
  7. Nov 23, 2013 #6

    Nugatory

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    No. Although there are lots of popular explanations that make it sound that way, that's not how entanglement works.

    If I measure one member of an entangled pair and get +, then I know that if the other guy measures his particle he will get -. However, I can't send him a signal that way, because for all I know he's already measured his particle and gotten a -. Even if he hasn't, when he goes to measure his particle and gets a -, he has no way of knowing whether I've measured mine and gotten a + already; all he knows is that if I do make a measurement it'll come out +.

    In fact, we can't even tell that we're dealing with entangled pairs until we get together afterwards and compare notes, see that whatever he measured, I measured the opposite, and vice versa.
     
  8. Nov 23, 2013 #7
    So is there no way to manually change it from a + to a -?

    and have an entangled pair in two separate vacuums meaning you know they are entangled... I am not thinking about what is practical just possible in theory.
     
  9. Nov 23, 2013 #8

    Nugatory

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    There is, but you can't send any information that way. You can't turn a + into a - unless you already know that it's a +, and if you know that you've already made a measurement on the particle so you're done with the entanglement and your + and his - are going their separate ways.
     
  10. Nov 23, 2013 #9
    Then surely holding these entangled particles for ever can be used as a binary form computing... 11011101001001010101110 style if the system on one end was designed to take readings at a set interval and the other machine takes readings AND changes it from a 1 to a 0 if its not in the correct state...

    Obviously I have my view completely wrong and will need to read up on it I think.
     
  11. Nov 23, 2013 #10

    Nugatory

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    You missed the part above about the particles going their separate ways after a measurement. You only get one measurement on each entangled pair, and then they're no longer entangled.
     
  12. Nov 24, 2013 #11
    read

    Super Physics Smackdown: Relativity vs Quantum Mechanics
    http://www.technologyreview.com/vie...kdown-relativity-v-quantum-mechanicsin-space/
    http://arxiv.org/abs/1206.4949v2
    Class. Quantum Grav. 29 224011

     
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