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

D-Wave is the latest quantum computing company to say it has achieved “quantum supremacy,” better known as the ability to solve a problem with a quantum computer that can’t be done with a traditional computer.