# Warp drives In General Relativity, it is possible to make a spaceship travel faster than the speed of light as seen by a distant observer. Such constructions require exotic matter. ## Refs - original - [[1994#Alcubierre]] - important work on the superluminal travel and energy conditions - [[1998#Olum]] - [[2000#Visser, Bassett, Liberati]] - [[2021#Bobrick, Martire]]: independent argument that superluminal warp drives always violate WEC - constructions - [[2020#Lentz]]: claims superluminal using only positive energy but does not provide details that can be reproduced - wormhole-warp drive correspondence: - [[2024#Garattini, Zatrimaylov]] - book - Lobo's book: [](https://link.springer.com/content/pdf/10.1007/978-3-319-55182-1.pdf)