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Gravity doughnut may solve time travel problem

  1. Jul 15, 2005 #1

    Ivan Seeking

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    "Gravity doughnut" may solve time travel problem

    http://www.nature.com/news/2005/050711/full/050711-4.html
     
  2. jcsd
  3. Jul 15, 2005 #2

    George Jones

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    The arXiv version is here.

    Regards,
    George
     
  4. Jul 16, 2005 #3

    Chronos

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    Ori is captivated by the concept of self-interacting gravitational fields, which I do not find very interesting. It's the sort of unobserved 'ultraviolet catastrophe' that signals an incomplete theory.
     
  5. Jul 16, 2005 #4

    pervect

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    This is still interesting, because according to the author it does get around Hawking's chronology protection result (Phys. Rev. D46 (1992) 603).
     
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