Currently accepted models of physics, aiui, don’t permit unlimited computation within a bounded space and bounded time? Err, wait, I was going to cite Bremerma

Currently accepted models of physics, aiui, don’t permit unlimited computation within a bounded space and bounded time? Err, wait, I was going to cite Bremermann's limit, but that is for if moving from one quantum state to an orthogonal quantum state? Maybe that doesn’t rule it out completely if the computation is done in a way that doesn’t involve enough rotation of states to be able to distinguish? Ok, but I expect that with enough math that loophole could be ruled out.