A fault-tolerant quantum computer could be here by 2030, thanks to an invention called the "cat qubit," named after the famous Schrödinger's cat thought experiment, in which a cat locked in a box with a radioactive pellet exists in a superposition of "dead" and "alive" states until the box is opened .
Researchers from the Paris-based quantum technology company Alice & Bob unveiled the roadmap in a white paper published earlier this month.
