Too bad they don't reference the actual inventor of vorticity confinement, Dr. John Steinhoff of the University of Tennessee Space Institute:

https://en.wikipedia.org/wiki/John_Steinhoff

https://en.wikipedia.org/wiki/Vorticity_confinement

And some papers:

https://www.researchgate.net/publication/239547604_Modificat...

https://www.researchgate.net/publication/265066926_Computati...