I've been trying to follow these experiments that NASA is doing to try and warp space-time on a microscopic scale. Obviously that won't have us traveling at FTL speeds yet, but it would be proof of concept. From what I read, they are using a laser, and some kind of special ceramic material (I think) to try and make a microscopic warp. Now it's also said that a full sized drive would need some kind of unknown exotic matter to be useful. (That would be the next major hurdle in changing this from plausible to practical) I understand the basics of how they are making the measurements to see if a warp is created or not, and they are looking in the range of a few parts per million. My question is that I don't seem to understand how a laser could be expected to make such a warp in space-time? The articles I read weren't very clear on that part, so would anyone be able to explain how a laser could have that effect? Moderators: I am not sure if I put this in the correct forum, so please move to a better place if needed.