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The unphysical nature of "Warp Drive" [PDF]
Classical and Quantum Gravity, 1997 We will apply the quantum inequality type restrictions to Alcubierre's warp drive metric on a scale in which a local region of spacetime can be considered ``flat''.
Alcubierre M +9 more
core +6 more sources
Fundamental limitations on "warp drive" spacetimes [PDF]
Classical and Quantum Gravity, 2004 "Warp drive" spacetimes are useful as "gedanken-experiments" that force us to confront the foundations of general relativity, and among other things, to precisely formulate the notion of "superluminal" communication.
Alcubierre M +29 more
core +2 more sources
On the warp drive space-time [PDF]
Physical Review D, 1999 In this paper the problem of the quantum stability of the two-dimensional warp drive spacetime moving with an apparent faster than light velocity is considered.
A.E. Everett +32 more
core +5 more sources
Quantum effects in warp drives [PDF]
EPJ Web of Conferences, 2013 Warp drives are interesting configurations that, at least theoretically, provide a way to travel at superluminal speed. Unfortunately, several issues seem to forbid their realization.
Finazzi Stefano
doaj +2 more sources
Warp Drives and Closed Timelike Curves [PDF]
Classical and Quantum Gravity, 2023 Abstract It is commonly accepted that superluminal travel may be used to facilitate time travel. This is a purely special-relativistic argument, using the fact that for observers in two frames of reference, separated by a spacelike interval, the non-causal (spacelike) future of one observer includes part of the causal past of the other ...
Barak Shoshany, Ben Snodgrass
openalex +3 more sources
Black holes, warp drives, and energy conditions
Physics Letters BFollowing the work of H. Ellis, we study warp drives in the gravitational field of a Schwarzschild black hole. We find that as long as the warp drive crosses the black hole horizon at a subluminal speed, the horizon would be effectively absent inside the
Remo Garattini, Kirill Zatrimaylov
doaj +5 more sources
Warp-Drive Quantum Computation [PDF]
, 2004 4 pages, 2 figures, and 1 ...
Mikio Nakahara +4 more
openalex +3 more sources
Introducing physical warp drives [PDF]
Classical and Quantum Gravity, 2021 Abstract The Alcubierre warp drive is an exotic solution in general relativity. It allows for superluminal travel at the cost of enormous amounts of matter with negative mass density. For this reason, the Alcubierre warp drive has been widely considered unphysical.
Alexey Bobrick, Gianni Martire
openaire +3 more sources
Black Holes and Warp Drive [PDF]
, 2023 We study the generalizations of the original Alcubierre warp drive metric to the case of curved spacetime background. We find that the presence of a horizon is essential when one moves from spherical coordinates to Cartesian coordinates in order to avoid additional singularities.
Remo Garattini, Kirill Zatrimaylov
openalex +3 more sources
Warp drives, wavefronts and superluminality [PDF]
, 1999 Coule's primary objection to the Alcubierre "warpdrive" is that the material producing the warp field needs to be superluminal. This difficulty is solved by placing the drive material inside its own warp field (making the drive system part of the payload), but we then have to deal with Low's related objection, that there is then a restricted rate at ...
Eric Baird
openalex +3 more sources