[humanbydefault]

I understand your concerns about the so-called "quantum-gap" and to be honest with you... I share the same concerns but in a different angle.
Your quoted argument speaks about the 'impossibility of "particles" to go throught the GAP and never come back from it, I see the phenomenon the entire opposite way. I'll explain soon, but let me quote something I self-published in my book once about truth and lie... "The perfect lie is always the exact 'mirror-image' of the truth."
This could be the origin of the paradox we (humans) are trying to unveil unsuccesfully. It is the existence of those "particles" [makers of the atom as we know them] the eternal cycle of an alternate existence (reality) sustained by an energy resonance between two "dominiums" - two different mediums we have identified by the abreviations CPT (charge, parity and time). The GAP is protected -not by a supisticious 'gate' or some sort of cataclismic calamity threat but- by the internal structure of those energy-interaction we call orbitals.

I've said in my posts that the time-fractions between the so-called magnetic field and the electric filed (anti-bonding zones found in every single atom of the periodic table) and the spatial coordinates where chemical bondings form are so small that no measuring instrument could detect it.
It would be as if you were capable of observing a process that elapses faster-tan-light... you can't.
It is due to those time-fractions that uncertainty and probability took place in our physics today. Don't forget that Heisenberg employed a microscope in his study that concluded in the discovering of what he named "the uncertainty principle" and that microscope worked with light...not faster than "c".

QM is based on probabilities and gives us very good results in technological achievements, but it is still far from offering us a complete description of what I consider to be more than just 1 (one) physical reality, but 4 (four) inside the time-gap equivalent to one wavelength of a photon="c".

HBD

I hope you'll find a different alternative approach to your GAP... Keep asking yourself, it is the only path to knowledge and self-realization.