So, based on a conversation in LinekedIn it became apparent that I should add a section to the Gravitec website to address possible physics explanations for SFE. While I have heard a ton of frameworks, they are all just hypothetical frameworks. In my personal experience, anyone can propose a framework. By default this is like the movie Highlander, "There can be only one". So when we have several proposed frameworks, they are competing with each other as the real theoretical framework.
What I can say with 100% certainty is that the concept of a real negative energy field is a taboo subject in physics, just like inertial mass or complex numbers being more than just mathematical artifacts. They don't allow for its existence at the moment, which tells me that this is probably why physics is stuck. They arbitrarily eliminated the possibility of negative energy existing since they couldn't create a framework for its existence. Sad and probably a huge blunder that will become self-evident many years in the future.
All that said, let the games begin.