I am trying to come up with a plausible speculative physics explanation for a story I am writing where the conceit is that phsyicists discover the universe is a simulation. The idea is that the simulation is reset to a particular time in the past (assuming there is some way the base universe computer knows what it was then), except that a specific volume of space surrounding the time traveler in isn't. This has the effect of destroying the present universe (and everyone in it) and restarting it.
Question: What do you think of my current below explanation? Can it be improved?
My answer: Scientists discover that our universe is indeed the result of a simulator in a more complex (base) universe simulating a simpler universe (akin to us living in 3d simulating a 2d or 1d world) and quantum mechanics is some optimisation technique to make it easier for the base universe to compute our reality. We in the simulated universe then discover how to hack it. The way we do this is that a branch of quantum computing develops to explore weird artifacts / patterns in the superpositions that has something to do with the Mandlebrot set (the weird artifacts). Realising that this might be the artefact of our simulation being rendered by another more complex universe, the scientists try to discover more about how the software of the universe works by probing these artefacts. They do this by asking specific questions in the quantum computer (or other quantumy things) and use deep learning networks to encode the data. By doing this for long enough and giving the neural net the ability to run its own quantum experiments, the neural net figures out the architecture of the base reality enough to be able to transfer its knowledge of the codebase of our universe to being able to hack it somehow.
I assume that sims can affect hardware in the real world. For instance, if in some far future on Earth we create self-aware sims and they figure out that they are running on a computer, they could try to crash the computer by, for instance, doing lots of processor intensive tasks that might cause the computer to overheat and crash the computer.
I’m also assuming that the true nature of base reality physics is far beyond human comprehension so only massive amounts of experiments and self-learning by a massive neural net is possible to understand whatever is really there).
Does any of this idea seem believable given the concepts involved, or am I wholly misunderstanding some things? How could you tweak it?
What speculative physics would you suggest is best for this story concept? It's key that the time travel element occur by means of restarting the simulation. A key story element is that some characters really don't want the time travel device to work as it will end up killing them and everyone they know. Also, the discovery the world is a simulation has interesting implications for religion. Finally, I am wondering what else one could do if this was all possible? e.g. could the universe be made of voxels and hackers could switch them on and off etc. Ideally I want hacking to be possible with tech that could conceivably be done within the next 50 years.
If anyone has better ideas of how to accomplish this task, or it's been thought of before, very grateful!