Criticism of the paper:
“And then it gets shady. “Where’s my warp bubble?” They didn’t make one. In fact, they didn’t calculate one, either. All they did was show that the three-dimensional energy density generated by this cavity displayed some qualitative correlations with the energy density field required by the Alcubierre drive. They don’t match in a quantitative sense; they were not generated experimentally, but only calculated numerically; and most importantly, they are restricted to microscopic scales and extremely low energy densities. There’s a lot of speculation and conjecture, and all of it is unproven.
“That isn’t to say this might not be an interesting idea that might someday pan out. But the most generous thing I can say about it is this: it isn’t fully baked. The most worrisome part, as a scientist familiar with Dr. White’s grandiose claims surrounding physics-violating engines in the past, is that he’s making new grand claims without adequate supporting evidence. He’s going to be looking at tiny, low-power systems and attempting to make measurements right at the limit of what his equipment will be able to detect. And, in the very recent past, he has fooled himself (and many others) into believing a novel effect was present when, in fact, it was not. An error, where his team failed to account for the magnetic and electric fields generated by the wires powering his previous apparatus, was all he wound up measuring.”
https://bigthink.com/starts-with-a-bang/no-warp-bubble/
I wrote the book on warp drive. No, we didn’t accidentally create a warp bubble.