You’ve just booted up a game on a state-of-the-art quantum computer. You’re running 19 superconducting quantum bits on a processor held at near absolute zero. Anticipating its sheer power, you press ...

In the school computer labs of the 1970s, the games asked a lot of questions. More specifically, they asked for a lot of numbers. Typed-in numbers were the fuel needed to power the games — typically ...