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

Quantum computing firm D-Wave claims it has demonstrated quantum supremacy on a “useful, real-world problem.” The company said the achievement was made using D-Wave’s Advantage2 prototype annealing quantum computer. Quantum supremacy is when a quantum computer can carry out calculations that classical computers practically cannot.

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