I am currently a twitter user. One of my followings is Jeri Ryan. She has been Seven of Nine in Star Trek Voyager saga. Yesterday, it comes out of the blue what I read in one of her twits: NASA is developing warp drive! Indeed, Jeri was pointing to this link. This is a Gizmodo’s post that was describing an effort by NASA to develop warp drive and it seemed like something consistent was in hand. Indeed, this is all true. It is a lab at NASA, Eagleworks, headed by Harold White that is working on a technical realization of the most recent ideas from physics in the area of “spacetime engineering”. This is somewhat of a new term as, so far, no ways were at our disposal to modify spacetime even if, in principle, this is a possibility offered by general relativity. If one would be able to do so, we would have warp drive but also time machines, wormholes and all that. White’s group claims to have found some loopholes in all the hurdles encountered so far in this kind of researches. The most fundamental one is that one needs a huge quantity of exotic matter to get some of these devices work. Nothing that is manageable in practice. So, all this matter was always put in an area of research much theoretical oriented. In a quite recent paper, Stefano Finazzi, Stefano Liberati and Carlos Barceló (see here) show that Alcubierre drive is unstable with respect to quantum effects: Indeed, if you go faster than light, Hawking radiation will kill you.
So, there are some important difficulties to overcome to change the situation from theoretical to a practical one. One of the Editors of Physical Review Letters, Robert Garisto, commented as follows on twitter:
NASA warp drive story: Not sure which is less plausible, that it’s allowed by physics or that we could implement it if it were.
White’s group claims that they are on the verge to realize an experiment comparable to the Chicago Fermi’s experiment on the nuclear pile. This would imply that they have overcome all the difficulties seen so far in this kind of studies and are able to provide a working realization of the effect. You can find a paper by White here and is worth reading. They can controvert any skepticism by a sound experimental proof.
My view is always the same: As a physicist I have a blind faith on experimental facts and I would like to see accomplished one of my lifetime dreams arisen with that small step by Armstrong on the Moon. NASA is never a disappointment.
Stefano Finazzi, Stefano Liberati, & Carlos Barceló (2009). Semiclassical instability of dynamical warp drives PHYSICAL REVIEW D 79, 124017 (2009) arXiv: 0904.0141v2
Miguel Alcubierre (2000). The warp drive: hyper-fast travel within general relativity Class.Quant.Grav.11:L73-L77,1994 arXiv: gr-qc/0009013v1