(It's an old sci-fi concept for using a phenomenon with no measurable propagation rate as a communications medium over interstellar distances.)
Thanks for that;I was wracking my brain trying to remember the right term.
IIRC, it's same phenom Heinlein used to explain his twins' telepathy in Time for the Stars; I think it was A.E. van Vogt who used it extensively in some of his yarns.
I know it has also been postulated as an explaination for some paranormal phenomena many times.
Yep, the first thing I thought of was the Ansibles.