>it seems tesla was on to something with frequency and vibration
Tesla admired Boscovich's "A Theory of Natural Philosophy"
As I recall, Tesla was somewhat an outsider to mainstream science of his time, but there was at least one man whose worked he admired and respected. Ruggero Boscovich who lived who lived from 1711-1787. Boscovich's book "A Theory of Natural Philosophy" is the book Tesla is pictured contemplating over in the iconic picture we are all familiar with.
https://archive.org/details/theoryofnaturalp00boscrich/page/356/mode/2up
Reading Boscovich confirmed my intuition that "multiverse theory" is a mute point (pun intended).
Excerpt: "As stated by Boscovich, the whole of his Theory is contained in his statement
that: "Matter is composed of perfectly indivisible, non-extended, discrete points." To this assertion is conjoined the axiom that no two material points can be in the same point of space at the same time.