The history of the universe is, in effect, a huge and ongoing quantum computation. The universe is a quantum computer.
Seth LloydUnlike mathematical theorems, scientific results can't be proved. They can only be tested again and again, until only a fool would not believe them. I cannot prove that electrons exist..........if you don't believe in them I have a high voltage cattle prod I'm willing to apply as an argument on their behalf. Electrons speak for themselves.
Seth LloydComputers are famous for being able to do complicated things starting from simple programs.
Seth LloydWe 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 Lloyd