Review : From wormhole to time machine: Comments on Hawking’s Chronology Protection Conjecture
  • 1
  • Auteurs
    Matt Visser
  • Année de publication
    1993
  • Journal
    Phys.Rev.
  • Abstract (dans sa langue originale)

    The recent interest in "time machines'' has been largely fueled by the apparent ease with which such systems may be formed in general relativity, given relatively benign initial conditions such as the existence of traversable wormholes or of infinite cosmic strings. This rather disturbing state of affairs has led Hawking to formulate his Chronology Protection Conjecture, whereby the formation of "time machines'' is forbidden. This paper will use several simple examples to argue that the universe appears to exhibit a "defense in depth'' strategy in this regard. For appropriate parameter regimes Casimir effects, wormhole disruption effects, and gravitational back reaction effects all contribute to the fight against time travel. Particular attention is paid to the role of the quantum gravity cutoff. For the class of model problems considered it is shown that the gravitational back reaction becomes large before the Planck scale quantum gravity cutoff is reached, thus supporting Hawking's conjecture.

  • Identifiant unique
    DOI: 10.1103/PhysRevD.47.554
  • Accès libre
    Accéder à la référence
  • Apparait dans la controverse
    Le voyage dans le temps est-il possible en théorie? Si oui, quels sont les obstacles à sa mise en pratique?
  • Comment les contributeurs jugent la qualité scientifique de cette référence :

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