Computers are famous for being able to do complicated things starting from simple programs.
Seth LloydOne of the things that I've been doing recently in my scientific research is to ask this question: Is the universe actually capable of performing things like digital computations?
Seth LloydIndeed, as the above calculation indicates, to take full advantage of the memory space available, the ultimate laptop must turn all its matter into energy.
Seth LloydWhen you zap things with light to build quantum computers, you're hacking existing systems. You're hijacking the computation that's already happening in the universe, just like a hacker takes over someone else's computer.
Seth Lloyd