The quantum bits, or qubits, used in today's machines are highly unstable and only hold their quantum states for extremely short periods, creating "noise." As a result, "errors accumulate in the computer and after around 100 operations there are so many errors the computation fails," said Steve Brierley, chief executive of quantum software company Riverlane. That has led to a search for more stable qubits as well as error-correction techniques to overcome the "noise," pushing back the date when quantum computers are likely to reach their full potential by many years.
The Chinese claim, by contrast, appeared to be an endorsement of today's "noisy" systems, while also prompting a flurry of concern in the cyber security world over a potentially imminent threat to online security. By late last week, a number of researchers at the intersection of advanced mathematics ..
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