Here's a lovely video on the current thinking on the Albecurrie drive, the <cough> "engineering" issues and the impossiblities....
As he states, and I'll paraphrase, it's great to play with this solution as a way to figurately and literally reach for the stars, and dream a little, but in my own opinion this is going to take completely new physics, rather than engineering what we know now. New physics that I do think will come (eventually, whenever. And assuming civilisation does not come crashing down, never to attain our current heights of scientific knowledge)
Although there is no guarentee either that any new physics will allow FTL travel either....
As he states, and I'll paraphrase, it's great to play with this solution as a way to figurately and literally reach for the stars, and dream a little, but in my own opinion this is going to take completely new physics, rather than engineering what we know now. New physics that I do think will come (eventually, whenever. And assuming civilisation does not come crashing down, never to attain our current heights of scientific knowledge)
Although there is no guarentee either that any new physics will allow FTL travel either....