"A quantum computer uses a sequence of quantum bits, or qubits. They can represent information as 0 or 1 or any of a series of states between 0 and 1."

This sounds much like analog computing, which has been around for decades. It's way faster than digital computing, but sometimes your answer depends on the temperature in the room.

True, it's at the atomic level, but is there any other difference? Could analog algorithms from the 20th century be used by quantum systems?