Abstract
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 terrestrial observer) time.
- Received 22 July 1997
DOI:https://doi.org/10.1103/PhysRevD.57.4760
©1998 American Physical Society
