This is actually related to some of the thought experiments I have dwelled on. The possibility, or rather a reasonable explanation of alternate universes. Not so much identical universes, with alternate history, but perpendicular universes with adjusted physics. I like to borrow my analogies from what we discovered in String Theory. We discovered so many equations and universe models that made the same outcome, that we didn't know where to start. These initial equations had an even deeper underlying symmetry, in higher dimensions. Upon expanding into them, the multiple similar equations began to unite, showing themselves as being part of one, even more complex formula. The real universe, or
omniverse, has the wave function of all simultaneous equations in string theory. All possible solutions overlapping into one function.
This brought me to the conclusion that the real object that contains all that there is, the
real universe, is much further reaching, containing much more. If we extend our definition of what we consider to be the universe, then we exist on a cross section at some depth, angle, and thickness. The
real universe will then contain all possible cross sections, and thus all planes of a manifested reality. Some will contain life, where others will not. All universes that do contain some form of loosely defined " life "will be a case of where the particulars are different, but the result is the same. The laws of physics are different, but they interplay and converge into alternate harmonic modes of vibration. It's like a similar musical note from an entirely different musical instrument. Or, perhaps a symphony of different instruments playing the same musical piece, producing the same notes. The underlying mechanics is completely different, but can manifest into a similar version.
As for travelling to these other reality planes, well, it would have to be done with some sort of super-advanced ship that had this capability. It can pinch itself off into a miniature hypersphere, and navigate this bubble miniverse to other cross sections. The issue with energy structure compatibility is a big deal. Once you step outside the bubble, you will evaporate into nothing. You would have to be converted into a native energy structure in order to survive, or interact with anything. That means, complete dematerialization, followed by reconstruction into a stable atomic pattern. It's not so much
how to do it, but whether or not you have the guts to do it