One big difference: Normal computers use data that exist in only one state at a time — a one, or a zero. Quantum computers use quantum bits, or qubits, which can simultaneously be any combination of zero and one. The difference means much faster processing speeds.
“Achieving the necessary computational capabilities will still require years of hard engineering and scientific work. But we see a path clearly now, and we’re eager to move ahead,” it said in the post.
The speed experiment devised by Google was criticized by some experts and rival companies after the results leaked online ahead of their official publication date.
“We urge the community to treat claims that, for the first time, a quantum computer did something that a classical computer cannot with a large dose of skepticism,” IBM said.
“The first plane flew only for 12 seconds, and so there is no practical application of that,” said Pichai. “But it showed the possibility that a plane could fly.”