A series of rotating resonance coils arranged in a circle on a disc, pushing gravity wave outwards, might create a thin region of no space within the circle. A "nowhere" region without dimension that connects immediately to another similar rotating circle. Behind the circle is blocked. If the no space region is too thick, plasma develops.
Stepping into the one "nowhere" region, you immediately step out of the other "nowhere" region. In another word, a portal pair.
What happens if you have more than a pair? Three portal doors. Do you get duplicated/cloned? Orientation of the portals might play a role.
Even if only a pair of such parallel portals can exist, it is still possible to share. Real estate on the portal will be prime.
And now there are two worm holes in my head. Going somewhere, Alice?
