Article : Time Travel Paradoxes, Path Integrals, and the Many Worlds I nterpretation of Quantum Mechanics
  • 1
  • Auteurs
    Allen Everett
  • Année de publication
    2004
  • Journal
    Phys.Rev.
  • Abstract (dans sa langue originale)

    We consider two approaches to evading paradoxes in quantum mechanics with closed timelike curves (CTCs). In a model similar to Politzer's, assuming pure states and using path integrals, we show that the problems of paradoxes and of unitarity violation are related; preserving unitarity avoids paradoxes by modifying the time evolution so that improbable events bewcome certain. Deutsch has argued, using the density matrix, that paradoxes do not occur in the "many worlds interpretation". We find that in this approach account must be taken of the resolution time of the device that detects objects emerging from a wormhole or other time machine. When this is done one finds that this approach is viable only if macroscopic objects traversing a wormhole interact with it so strongly that they are broken into microscopic fragments.

  • Identifiant unique
    DOI: 10.1103/PhysRevD.69.124023
  • Accès libre
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  • 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?
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