u/Ok-Respond8928

I've been thinking about a speculative idea and would appreciate help understanding where it conflicts with established physics.

If large amounts of antimatter existed in regions far from the observable matter in the universe, could the gravitational or electrical attraction between matter and antimatter contribute to, or even explain, the large-scale motion we interpret as the expansion of the universe? Maybe the universe expands into a void filled with antimatter because we know antimatter attracts matter, that could explain why it is propagating

Am I making sense? This ditches the need for dark energy.

Why can't quantum computers solve the Halting problem?

And, what would hypercomputation look like.