Alphabet's Willow chip addresses a key challenge with advancing quantum computing technology.

Amazon is boosting its quantum computing bets with Peter DeSantis, its new leader for AI models, custom silicon (semiconductor chips) and quantum computing. DeSantis is a 27-year Amazon veteran who ...

Rigetti is making advancements, but its quantum computing systems are error-prone, and the company is burning through cash. IBM, meanwhile, is a quantum-first company supported by its legacy business.

Alphabet and Microsoft have the tech chops and cash to win in quantum computing.

IonQ's approach to quantum computing is different from that of its peers.