Are machines better at quantum physics than humans?

I'm only a layman when it comes to circuit engineering, but if you made a computer with superconductive circuitry wouldn't it still generate heat since common gates like AND and OR are irreversible (i.e., cause information loss)? If that lost information weren't released as heat then it would seem to violate thermodynamics.

If we switched to quantum computers though, all operations are necessarily reversible, so potentially we could develop a system that generates no extra heat.