Time warps

  title={Time warps},
  author={Steven S. Gubser},
  journal={Journal of High Energy Physics},
  • S. Gubser
  • Published 30 December 2008
  • Physics
  • Journal of High Energy Physics
I reconsider asymmetrically warped compactifications, in which time and space have different warp factors. I call such compactifications time warps if the bulk geometry has neither entropy nor temperature. I provide an example starting from an asymptotically AdS5 spacetime where the speed of light, measured in a fixed coordinate system, is larger near the boundary than it is deep in the interior. This example follows the general plan of earlier work on superconducting black holes. To obtain a… 
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