Special:Badtitle/NS3000:Alcubierre Drive

TL;DR Claim(s) to Fame

• Proposed in 1994 as a general-relativity spacetime metric (“warp bubble”) that yields effective faster-than-light travel for distant observers without locally exceeding light speed.
• Requires “exotic” stress–energy in most formulations, typically involving negative energy density / energy-condition violations, which is the core feasibility obstacle.
• Superluminal versions generate horizons and severe control/causality issues (e.g., communication limits across the bubble boundary), plus likely quantum backreaction instabilities.
• Spawned decades of variants (Natário, Van den Broeck, “physical warp drives,” soliton ideas) mostly trading one hard constraint for another rather than producing an engineering blueprint.
• Became a flagship concept in popular science and UAP-adjacent “advanced propulsion” rhetoric, often overstated as “NASA is building a warp drive” despite remaining speculative theory.
• Endures as a stress-test for semiclassical gravity: it cleanly separates “a metric exists” from “a physically buildable configuration exists.”