Wolv1's questions about causality and particles

Discussion in 'Physics & Math' started by Wolv1, Aug 25, 2008.

  1. Guest254 Valued Senior Member

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    What do you mean by "real"? In the mathematical sense, they certainly exist, as I mentioned in the last thread:
    In addition, there are several solutions to the Einstein field equations that admit closed timelike curves.
     
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  3. Wolv1 Banned Banned

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    you say any spacetime admits them,why aren't we able to find them?
     
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  5. Guest254 Valued Senior Member

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    The word "spacetime", in this context, refers to a Lorentzian manifold.
     
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  7. Wolv1 Banned Banned

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    ive been told that many think quantum mechanics will prevent ctc's from ever forming? what other arguments are used against ctc's?
     
  8. Reiku Banned Banned

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    It admits them, in the sense, they ''should be.'' But there is no evidence as of yet.
     
  9. Wolv1 Banned Banned

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    Wolv's questions about causality

    just doing some research on this toppic.
     
  10. Read-Only Valued Senior Member

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    Nope, not possible at all. Never was and never will be.
     
  11. 11parcal Saint of Cynicism Registered Senior Member

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    Oh I'm sure it's possible... well maybe not PHYSICALLY possible but THEORETICALLY i'm sure it is, based on what little I know about the universe I suppose if you traveled fast enough (faster then C) you could potentially move faster then time... or I'm a nutjob; either works

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  12. James R Just this guy, you know? Staff Member

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    Certain theories of spacetime wormholes might make it possible. However, there may well be things we don't understand about space and time yet which still make it impossible.

    To build a wormhole for timetravel, you'd also need matter with very special properties, sometimes referred to as "exotic matter".
     
  13. 11parcal Saint of Cynicism Registered Senior Member

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    I could do it, I'll show you, I'll show you all!!!
     
  14. Wolv1 Banned Banned

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    how about closed timelike curves? they violate causality
     
  15. James R Just this guy, you know? Staff Member

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    Yes - but how would you make one?
     
  16. darksidZz Valued Senior Member

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    Well I have alot of theories.... Tesla said space can't have properties because it's the absence of matter. Modern science proves light bends and space-time can be manipulated using mass. So....

    If we do guesswork we can say that time travel is possible yes, because we understand so little of how the universe is composed that in all likeliness it can occur. For a modern take on the physics behind this visit the famous

    http://www.chronos.ws/

    And they'll be happy to fill you in, just read. I myself think space-time might not even be real, perhaps space lacks properties and such as Tesla said, perhaps not. I do say studying current theories won't make anyones idea of this true or not.

    PS Don't flame me :W
     
  17. Wolv1 Banned Banned

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    well, i know godel's & kerr's metric have closed timelike curve's,if they the universe didnt have ctc's at all would it effect relativity?
     
    Last edited: Aug 28, 2008
  18. Read-Only Valued Senior Member

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    This isn't a flame, just a simple question: what led you to make the trememdous leap to "in all likeness it can occur."??????
     
  19. Myles Registered Senior Member

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    Haven't you heard the one about going back in time and killing your grandfather ?
     
  20. Pete It's not rocket surgery Moderator

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    Hi Wolv1,
    Kip Thorne's Black Holes and Time Warps gives a good semi-technical discussion of ctc's.

    I think that "are they real" is the wrong question at this time... "Can they exist" might be a better one, with "Can they form" as a sideliner.
     
  21. cosmictraveler Be kind to yourself always. Valued Senior Member

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    Of course time travel is possible! Haven't you ever seen the TV series the "Time Tunnel"? Or read the book" The Time Machine " by H G Wells? As long as there's science fiction writers there's always going to be time travel.

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  22. Guest254 Valued Senior Member

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    Hi Wolv1,

    Could I ask a rather intruding question: what level of physics are you currently working at? I previously tried to answer a similar question of yours, but it would seem it was unsatisfactory.

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  23. Norsefire Salam Shalom Salom Registered Senior Member

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    It's theoretically possible if you can exceed the speed of light; however, matter cannot do this because it requires an infinite (?) amount of energy, and THAT is impossible.
     

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