And it's not just big tech which has an interest. Many predict we still have decades to go, but most agree that QC is coming – it's a matter of when, not if. More than 99% accuracy is thought to be the threshold at which quantum processors can be scaled into computers.Įstimates as to when quantum computing will go mainstream vary widely and IBM's optimism may yet prove misplaced. This is a huge step forward because the instability of qubits has been a fundamental stumbling block to accuracy and scale of quantum computing. More recently, however, Australian scientists announced that silicon quantum computers can now be operated with better than 99% accuracy. These developments, while impressive, do not provide quantum advantage, even if they do demonstrate quantum supremacy. QuEra announced shortly after that it had built a 256 qubit device using a different technology. ![]() At the end of 2021, IBM announced it had developed a 127 qubit processor and it is looking to produce a 1,121-qubit chip by 2023. It claimed its 54-qubit Sycmamore quantum processor performed a specific task in 200 seconds which would have taken the world's most sophisticated computer 10,000 years to complete (although this was later challenged by IBM). In October 2019, Google announced it had achieved quantum supremacy. 'Big tech' businesses including IBM, Microsoft, Google and Amazon Web Services are working to develop quantum computing. Let's call that 'quantum advantage' although the term means different things to different people and can sometimes be used interchangeably with 'quantum supremacy', usually taken to mean the solving of a specific problem faster than by using a conventional device. ![]() That is to say, we have seen them but we are still some way off a situation where quantum computing can solve real-world problems beyond the scope of current hardware. ![]() Quantum computers are the fastest computers humanity has not quite seen.
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