A jump rive, (or a with a capital J) is one of the speculative inventions in science fiction, a method of traveling faster than light (FTL). Related concepts are hyperdrive, warp drive and interstellar teleporter. The key characteristic of a jump drive (as the term is usually used) is that it allows a starship to be instantaneously teleported between two points. A jump drive is supposed to make a spaceship (or any matter) go from one point in space to another point, which may be several light years away, in a single instant. Like time travel, a jump drive is often taken as a granted thing in science fiction. Very few science fiction works talk about the purported mechanics behind a jump drive. There are vague indications of the involvement of tachyons, space-time continuum, etc. in some of the science fiction works.