[The_Reader_David]

Yes, but there is no evidence that one can get the requisite extra negative mass to build the Alcubierre warp drive, or open a stable wormhole. The creation of negative mass (which does happen in certain quantum mechanical events) is always accompanied by the creation nearby of a larger positive mass.

[JamesP81]

Yes, but there is no evidence that one can get the requisite extra negative mass to build the Alcubierre warp drive, or open a stable wormhole.

Granted, there is not enough research into the phenomenon to know if it can even be done, but we won't know until it's investigated more thoroughly.