"In theory" is doing a lot of work there -- see https://en.wikipedia.org/wiki/Alcubierre_drive https://en.wikipedia.org/wiki/Alcubierre_drive -- you need to app

"In theory" is doing a lot of work there -- see https://en.wikipedia.org/wiki/Alcubierre_drive https://en.wikipedia.org/wiki/Alcubierre_drive -- you need to apply a type of matter that we're not even sure actually exists, even if the type of matter exists you would need to find a way to harness it, and even if that's possible, we're not sure if this works in an as of yet hypothetical unification of general relativity and quantum mechanics.