We couldn't build quantum computers unless the universe were quantum and computing. We can build such machines because the universe is storing and processing information in the quantum realm. When we build quantum computers, we're hijacking that underlying computation in order to make it do things we want: little and/or/not calculations. We're hacking into the universe.
Seth LloydThere are considerable advantages to using many degrees of freedom to store information, stability and controllability being perhaps the most important.
Seth LloydWhen it comes to their capacity to screw things up, computers are becoming more human every day.
Seth LloydScience consists exactly of those forms of knowledge that can be verified and duplicated by anybody.
Seth LloydQuantum mechanics is just completely strange and counterintuitive. We can't believe that things can be here [in one place] and there [in another place] at the same time. And yet that's a fundamental piece of quantum mechanics. So then the question is, life is dealing us weird lemons, can we make some weird lemonade from this?
Seth Lloyd