Is time travel possible based on theory?

Discussion in 'Physics & Math' started by Saint, Jun 9, 2019.

  1. Write4U Valued Senior Member

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    Excerpt from an interesting treatise on David Bohm, by David Peat (physicist).
    http://cspeech.ucd.ie/Fred/docs/Bohm_2005_.pdf

    I posted this as I believe it may touch on the OP question of time travel.
     
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  3. Write4U Valued Senior Member

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    https://thebohmdocumentary.org/the-quantum-potential/
     
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  5. exchemist Valued Senior Member

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    You are insane.

    [click]
     
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  7. Write4U Valued Senior Member

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    I am insane? Sorry, I forgot to provide the link to the Wikipedia page. Perhaps they are insane.....

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    Let me add to the insanity;
    https://www.britannica.com/science/electric-potential
    https://www.dictionary.com/browse/potential-energy

    If that is insane, science is insane, no?

    All definitions share a common denominator: potential = that which may become (expressed in) reality.

    It's really not a complicated proposition.
     
    Last edited: Sep 23, 2019
  8. TheFrogger Valued Senior Member

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    Should someone reverse time all they would learn is what has already happened (it was them who stepped on that bug.) It is impossible to change the past, although it is possible to travel to it.
     
  9. Write4U Valued Senior Member

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    At best we can only observe the past from the future, but never return to it.

    IMO, Bohm proved that with his ink-drop in glycerine experiment.

    https://transitionconsciousness.wordpress.com/2015/09/19/the-experiment-which-inspired-david-bohm/

    Note how the past is neatly reconstructed, but only from a future present. Moreover, note the slow speed of the turn. This is to avoid turbulence which introduces randomness. When these few seconds are multiplied by years of history, when "turning" back time the avoidance of creating spacetime turbulence is a priori, but impossible to achieve.
     
    Last edited: Sep 25, 2019
  10. TheFrogger Valued Senior Member

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    Viewing the past is possible with photographs, or television.
     
  11. Write4U Valued Senior Member

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    Not in very great detail. Consider that what we see as a speck might be bigger than our own galaxy and impossible to recreate in detail.
     
  12. Janus58 Valued Senior Member

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    That leads to predetermination. Your "future" is already in someone's else's past. If they can't change their past to change their present because for them "it already happened" then it must also must happen in your future, which means you are also powerless to change it, ego everything is predetermined.
     
  13. Write4U Valued Senior Member

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    But considering our limited access to all the mathematical potentials in play, for us the future is probabilistic at best (butterfly effect)...

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  14. Janus58 Valued Senior Member

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    The reply was addressing the claim that you could travel in time, but not effect events. If you follow that reasoning, then you also have to accept predetermination. It was not arguing that this how the universe actually works.

    If you an consider a quantum probability approach, things can be quite different. For one, quantum uncertainty could also means that the past is as undetermined as the future; that there are multiple versions of the past that lead to our present just as there are multiple possible versions of the future. Such a model would side-step the grandfather paradox. Go back and stop your parents from meeting and you don't vanish ala Marty Mcfly, you just cut yourself off from any "future" where you were born. Travel forward from this point and you can only reach futures where you were never born.

    Time travel is a fun idea to play with, but that is about it.
     
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  15. Write4U Valued Senior Member

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    In that spirit, could we argue that the past is no longer probabilistic as all extant wave-functions at that time have collapsed and you cannot get back deeper in time than the collapse of the wave function which is responsible for expression in reality, no?
     
  16. TheFrogger Valued Senior Member

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    Even Einstein knew infinity is needed for time-travel.
     
  17. TheFrogger Valued Senior Member

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    The millennium was also the end of a decade, and a century.

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  18. Write4U Valued Senior Member

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    Yes, that would confirm we use the decimal system when counting time blocks.......

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  19. TheFrogger Valued Senior Member

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    So which one was it, Write4u?

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  20. Write4U Valued Senior Member

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    It could be all three simultaneously.......depends on when you start counting....

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  21. TheFrogger Valued Senior Member

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    How true, Write4u, how true.

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    So you're saying it could be ALL of them?

    Inteeerrreeessstttiiinnngg. *strokes chin*
     
  22. TheFrogger Valued Senior Member

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    Hi again.

    Even if someone were to travel at the speed of light, they will eventually slow to sub-light speeds. It's not FOREVER!

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  23. TheFrogger Valued Senior Member

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    Unlike my Father, who decided that was his last cigarette, AND IT WAS!

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