Not sure, I haven't done all that much physics since undergrad (it was my major). But with regard to the negative matter issue mentioned by another commenter,

Not sure, I haven't done all that much physics since undergrad (it was my major). But with regard to the negative matter issue mentioned by another commenter, there is this in the wikipedia article: > However, at the close of his original paper[2] Alcubierre argued (following an argument developed by physicists analyzing traversable wormholes[3][4]) that the Casimir vacuum between parallel plates could fulfill the negative-energy requirement for the Alcubierre drive.