The Alcubierre Metric

The Alcubierre metric is a theoretical model in physics that proposes a way to faster-than-light travel by manipulating spacetime itself. It suggests creating a "warp bubble" that contracts space in front of a spacecraft and expands it behind, effectively moving the craft without violating the laws of physics locally. This concept relies on exotic matter with negative energy density. While mathematically intriguing, actual implementation faces significant scientific and technological challenges, and it remains a theoretical idea rather than a practical method for space travel.