The Alcubierre metric, also known as the Alcubierre drive or warp drive, is a speculative mathematical model of a spacetime exhibiting some features reminiscent of the fictional faster than the speed of light warp drive from Star Trek; hence the name. The Alcubierre Drive is often called a 'solution' of Einstein's field equations in general relativity, but this is inaccurate; see Alcubierre metric.