Greg Egan writes novels with plots that revolve around high-end science, physics and mathematics with some very wild concepts and conclusions. Even better, he has animations and illustrations of some of his books' concepts on his website for those that want to go deeper.

I hadn't noticed his Miscellaneous Fiction section, so this is a nice rabbit hole to find.

My favourite short story, I link it often. Accelerando is my favourite novel, and I need to get back to reading such dense and heady sci-fi!