The "fluid model" is well known as superfluid vacuum theory. But the smoke ring vortex in this fluid model is my way of interpreting the alcubierre metric in that model and I want to know what others think of the idea.
It has been hypothesized by quantum field theory that the vacuum is not empty due to the energy time uncertainity relationship. Instead it is filled with a sea of virtual particles popping in and out of existence and renormalized to the observed value we see today in experiments like the casimir...
https://arxiv.org/abs/1807.09745 here is the link to a paper on alcubeierre metric in einstein cartan theory. But the fluid vortex model is made is my idea of how to interpret the results assuming that fluid analogy can be made of general relativity. You can also refer to superfluid vacuum...
I read this paper where if you take the alcubierre metric calaculations while including torsion in GR you get positive energy spin requirements instead of exotic matter. Here is the link: https://arxiv.org/abs/1807.09745
Could it be because a spinning quantum vacuum will be less stiff like a...