Nvidia's Jensen Huang is 'dead wrong' about quantum computers, D-Wave CEO says

D-Wave Quantum CEO Alan Baratz said Nvidia's Jensen Huang is "dead wrong" about quantum computing after comments from the head of the chip giant spooked Wall Street on Wednesday.

Huang was asked Tuesday about Nvidia's strategy for quantum computing. He said Nvidia could make conventional chips that are needed alongside quantum computing chips, but that those computers would need 1 million times the number of quantum processing units, called qubits, that they currently have.

Getting "very useful quantum computers" to market could take 15 to 30 years, Huang told analysts.

Huang's remarks sent stocks in the nascent industry slumping, with D-Wave plunging 36% on Wednesday.

"The reason he's wrong is that we at D-Wave are commercial today," Baratz told CNBC's Deirdre Bosa on "The Exchange." Baratz said companies including Mastercard and Japan's NTT Docomo "are using our quantum computers today in production to benefit their business operations."

"Not 30 years from now, not 20 years from now, not 15 years from now," Baratz said. "But right now today."

D-Wave's revenue is still minimal. Sales in the latest quarter fell 27% to $1.9 million from $2.6 million a year earlier.

Quantum computing promises to solve problems that are difficult for current processors, such as decoding encryption, generating random numbers and large-scale simulations. Technologists have been working on it for decades, and companies including Nvidia, Microsoft and IBM are pursuing it today, alongside researchers at startups and universities.

D-Wave was among a number of companies that enjoyed a revival of interest from investors in December, when Google announced a breakthrough in its own research. Google said it had completed a 100 qubit chip, the second of six