Hyperfast travel in general relativity

@article{Krasnikov1998HyperfastTI,
  title={Hyperfast travel in general relativity},
  author={Serguei Krasnikov},
  journal={Physical Review D},
  year={1998},
  volume={57},
  pages={4760-4766}
}
  • S. Krasnikov
  • Published 25 November 1995
  • Physics
  • Physical Review D
The problem is discussed of whether a traveler can reach a remote object and return sooner than a photon would when taking into account that the traveler can partly control the geometry of his world. It is argued that under some reasonable assumptions in globally hyperbolic space-times the traveler cannot hasten reaching the destination. Nevertheless, it is perhaps possible for the traveler to make an arbitrarily long round-trip within an arbitrarily short (from the point of view of a… 

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