New Warp Drive Research Dashes Faster-Than-Light Travel Dreams—but Reveals Stranger Possibilities
"If Bobrick and Martire are right, then a warp drive is just like any other object in motion. It would be subject to the universal speed limit enforced by general relativity after all, and it would need some kind of conventional propulsion system to make it accelerate.
The news gets worse. Many kinds of warp drive can only modify the spacetime inside in a certain way: by slowing down the clock of the passenger in exactly the way that makes a trip into deep space a problem.
Bobrick and Martire do show that some warp drives could travel faster than light, but only if they are created already traveling at that speed—which is no help for any ordinary human hoping for a bit of interstellar tourism."
"If Bobrick and Martire are right, then a warp drive is just like any other object in motion. It would be subject to the universal speed limit enforced by general relativity after all, and it would need some kind of conventional propulsion system to make it accelerate.
The news gets worse. Many kinds of warp drive can only modify the spacetime inside in a certain way: by slowing down the clock of the passenger in exactly the way that makes a trip into deep space a problem.
Bobrick and Martire do show that some warp drives could travel faster than light, but only if they are created already traveling at that speed—which is no help for any ordinary human hoping for a bit of interstellar tourism."