Impossibility of superluminal travel in Lorentz violating theories (Articolo in rivista)

Type
Label
  • Impossibility of superluminal travel in Lorentz violating theories (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevD.85.064020 (literal)
Alternative label
  • Coutant Antonin [ 1 ] ; Finazzi Stefano [ 2,3 ] ; Liberati Stefano [ 4,5 ] ; Parentani Renaud [ 1 ] (2012)
    Impossibility of superluminal travel in Lorentz violating theories
    in Physical review. D, Particles, fields, gravitation, and cosmology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Coutant Antonin [ 1 ] ; Finazzi Stefano [ 2,3 ] ; Liberati Stefano [ 4,5 ] ; Parentani Renaud [ 1 ] (literal)
Pagina inizio
  • 064020 (literal)
Pagina fine
  • 064020 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 6 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • [ 1 ] Univ Paris 11, CNRS UMR 8627, Phys Theor Lab, F-91405 Orsay, France [ 2 ] CNR BEC Ctr, I-38123 Povo, Italy [ 3 ] Univ Trent, Dipartimento Fis, I-38123 Povo, Italy [ 4 ] SISSA, I-34136 Trieste, Italy [ 5 ] Ist Nazl Fis Nucl, Sez Trieste, Milan, Italy (literal)
Titolo
  • Impossibility of superluminal travel in Lorentz violating theories (literal)
Abstract
  • Warp drives are space-times allowing for superluminal travel. However, they are quantum mechanically unstable because they produce a Hawking-like radiation which is blue shifted at their front wall without any bound. We reexamine this instability when local Lorentz invariance is violated at ultrahigh energy by dispersion, as in some theories of quantum gravity. Interestingly, even though the ultraviolet divergence is now regulated, warp drives are still unstable. Moreover the type of instability is different whether one uses a subluminal or a superluminal dispersion relation. In the first case, a black-hole laser yields an exponential amplification of the emitted flux whereas, in the second, infrared effects produce a linear growth of that flux. These results suggest that chronology could still be protected when violating Lorentz invariance. (literal)
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