We're still years away from practical full-scale quantum computing systems. That makes many quantum computing stocks risky.

IonQ and Alphabet are taking different approaches in quantum computing, and both could be long-term supercomputer stars.

Alphabet Inc.’s Google ran an algorithm on its “Willow” quantum-computing chip that can be repeated on similar platforms and outperform classical supercomputers, a breakthrough it said clears a path ...

Designed to accelerate advances in medicine and other fields, the tech giant’s quantum algorithm runs 13,000 times as fast as software written for a traditional supercomputer. A quantum computer at ...