Quantum computing company D-Wave has claimed to have achieved "quantum supremacy" by solving a "useful, real-world problem" more efficiently with their quantum computer than a traditional one for the first time.

D-Wave's claim that its quantum computers can solve problems that would take hundreds of years on classical machines have been undermined by two separate research groups showing that even an ordinary

The company says it has solved the first problem of scientific relevance with a quantum processor faster than could be done with classical computers—but others disagree