When rotating a superfluid (such as $^{4}$He) below its critical temperature, sometimes quantized vortices pop up, depending how fast one rotates this superfluid. In the SVT model, they propose that the vacuum may be some type of superfluid (it's all a bit speculative). Assuming that this is true, and that the Universe is rotating, then quantum vortices should pop up. What role would they then have in this model?
Sources for those that want to know a bit more:
Quantum Vortices: https://www.physics.umd.edu/courses/Phys726/The_Quantum_Vortex.htm
SVT : https://en.wikipedia.org/wiki/Superfluid_vacuum_theory