Dear Anton,
I gave you an example of Black Hole singularity from Wikipedia in order to show you that black holes and vacuum holes are very similar. However, since you do not accept the statements of modern science about Black Hole singularity, therefore I'll prove my point of view without using Black Holes.
Thus, your first question was 'Well, if there's nothing outside the universe, then as 'seen' from the outside, the universe doesn't exist, has no physical reality'.
You cannot exist outside of the Universe because a hole does not have the extension (length) and time, therefore it can not contain your body; therefore you cannot inspect the Universe from the outside and you cannot see the Universe from the outside because the light is not able to propagate outside of the Universe. An observer who physically is a part of the Universe and exist inside of the Universe can see the Universe only. You see, there is a good answer without involving Black Holes.
We can prove the reality of vacuum holes theoretically and experimentally. Theoretically: vacuum holes are the necessary elements of nature because they can explain quantum phenomena, gravitation, and teleportation. We can prove the existence of holes experimentally by using two atomic clocks: since holes do not have extent and time, therefore near the source of holes must appear time dilation and length contraction effects. Thus we must place first clocks near the source of holes and another control clocks aside. If the first clock tics slower, it is the proof that holes really exist.
You write: - ''This post also touches upon the subject of quantum teleportation, EPR experiments). Though a photon indeed bridges the spaceTIME distance between its source and receiver in no time at all, an observer does measure a time equal to their distance. Whereas in this sense a photon transmission is instantaneous, this is impossible for massive particles''
Quantum Teleportation is not instantaneous and transmits quantum state only, but not photons or energy.
Then, probably you write about Hole Teleportation: ''If they express and preserve their mass by exchanging energy, then displacing a mass would affect the energy of the objects it was anchored to in its original location, as well as that of its new neighbors after the displacement''.
Hole Teleportation is the instantaneous exchange of identical volumes. The original and finish volume/place must be absolutely identical respect to external force fields, therefore it cannot affect the energy of the object. Despite of displacement, the object interacts continually with environment because teleportation is instantaneous.
- ''Another problem is how you can instruct the particle to end up where you want it except by accelerating it''.
We cannot instruct the particle to end up where we want. At HT, when we delete the quantum memory, a particle appears at random in the Universe.
Sincerely,
Constantin