Speed limits in general relativity
Abstract
Some standard results on the initial value problem of general relativity in matter are reviewed. These results are applied first to show that in a well defined sense, finite perturbations in the gravitational field travel no faster than light, and second to show that it is impossible to construct a warp drive as considered by Alcubierre (1994 The warp drive: hyperfast travel within general relativity Class. Quantum Grav. 11 L737) in the absence of exotic matter.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 February 1999
 DOI:
 10.1088/02649381/16/2/016
 arXiv:
 arXiv:grqc/9812067
 Bibcode:
 1999CQGra..16..543L
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 7 pages