Obviously that isn't the case; if it were we'd simply roll out ternary computers, which have been used before. I'm no physicist, and my knowledge of quantum is

Obviously that isn't the case; if it were we'd simply roll out ternary computers, which have been used before. I'm no physicist, and my knowledge of quantum is mostly memories of an intro course I took 5 years ago, so I hope someone with a bit more knowledge can come and fill in the gaps here. Nevertheless, the basic principle is that quantum superposition allows us to parallelise things with relatively reasonable space requirements.