A team of experts working on Google's Sycamore machine said their quantum system had executed a calculation in 200 seconds that would have taken a classic computer 10,000 years to complete.
A rival team at IBM has already expressed scepticism about their claim.
But if verified and harnessed, the Google device could make even the world's most powerful supercomputers—capable of performing thousands of trillions of calculations per second—look like an early 2000s flip-phone.
“This is not about final and absolute dominance over classical computers,” said Dario Gil, who heads the IBM research lab in Yorktown Heights, N.Y., where the company is building its own quantum computers. ADVERTISEMENT
Other researchers dismissed the milestone because the calculation was notably esoteric. It generated random numbers using a quantum experiment that can’t necessarily be applied to other things.
Though IBM disputed that Google had really accomplished all that much, Dr. Gil argued that quantum computers were indeed getting closer to reality. “By 2020, we will be able to use them for commercial and scientific advantage,” he said.
A team of experts working on Google's Sycamore machine said their quantum system had executed a calculation in 200 seconds that would have taken a classic computer 10,000 years to complete.
A rival team at IBM has already expressed scepticism about their claim.
But if verified and harnessed, the Google device could make even the world's most powerful supercomputers—capable of performing thousands of trillions of calculations per second—look like an early 2000s flip-phone.