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

Key Takeaways D-Wave and other quantum computing stocks soared Wednesday after the company claimed to achieve a breakthrough.D-Wave said its quantum computer outperformed one of the world's most powerful classical supercomputers.

D-Wave Quantum Inc. said today a peer-reviewed scientific paper proves it has finally passed a critical threshold and achieved “quantum supremacy” — that is, the point at which its quantum computers have finally solved a problem that’s impossible for even the most powerful “classical” computers to do.