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The Alcubierre metric defines the warp-drive spacetime.It is a Lorentzian manifold that, if interpreted in the context of general relativity, allows a warp bubble to appear in previously flat spacetime and move away at effectively faster-than-light speed.
Alcubierre obtained a Licentiate degree in physics in 1988 and a MSc degree in theoretical physics in 1990, both at the National Autonomous University of Mexico (UNAM). At the end of 1990, Alcubierre moved to Wales to attend graduate school at Cardiff University, receiving his PhD degree in 1994 through study of numerical general relativity.
Intergalactic travel for humans is therefore possible, in theory, from the point of view of the traveler. [7] For example, a rocket that accelerated at standard acceleration due to gravity toward the Andromeda Galaxy and started to decelerate halfway through the trip would arrive in about 28 years, from the frame of reference of the observer. [8]
A Krasnikov tube [1] is a speculative mechanism for space travel involving the warping of spacetime into permanent superluminal tunnels. The resulting structure is analogous to a wormhole or an immobile Alcubierre drive (and like them requires exotic matter with negative energy density) with the endpoints displaced in time as well as space.
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The possibility of communication between parallel universes has been dubbed interuniversal travel. [65] Wormhole can also be depicted in a Penrose diagram of a Schwarzschild black hole. In the Penrose diagram, an object traveling faster than light will cross the black hole and will emerge from another end into a different space, time or universe.
These included the gravity-based pitch drive, bias drive, disjunction drive and diametric drive; the Alcubierre drive; and the vacuum energy based differential sail. [13] The project then considered the mechanisms behind these drives. At the end of the project, three mechanisms were identified as areas for future research.
Serguei Vladilenovich Krasnikov (Russian: Серге́й Владиле́нович Кра́сников; 10 September 1961 – 19 March 2024) was a Russian physicist, Doctor of Sciences in Physical and Mathematical Sciences, graduate of Leningrad State University.