@HDMI1 With the caveat that I'm also talking out of my ass, I'm not sure if it's a translation issue or what the original said, but his talking about a kind of encroachment of "something" from another dimension, and his theory on perception of dimensions don't match.
Since the latter makes more sense, what he's saying is that if you imagine "existence" as a matrix with a large number of axis/dimensions, as 3-dimensional beings (actually 4, due to the time axis), we only can perceive that many dimensions. However, higher order dimensions still exist in that matrix, and something that only exists with perhaps 5 or higher orders of dimensional axis, is causing the "shadow" phenomenon, much like how objects in our level of order can cause something with lower orders of dimensions to form (objects creating shadows).
Using his universal gravity example, something from a higher order can cause distortion in the same "space" as us. If the other scientist hypothesis that dark matter is involved is right, and if dark matter is really some kind of higher order matter, we know dark matter also causes gravitational distortion like regular mass. But it may also have other effects, perhaps if it clumps and accumulates. And that's where the Gate may be involved....or it caused the gate to form, by tearing a hole in space.....a theory that Lelei has already arrived at by commenting on whether it's possible for a mass with certain properties to do such a thing.
@Hell_Satan Technically, it's not quantum physics...yet. Quantum physics uses study of higher order dimensions to try and resolve some outstanding issues with how we understand quantum mechanics....particularly entanglement. But technically, it's not directly related.