Google 量子 AI 团队首次在物理硬件上演示魔力态培育，在 105 量子比特 Willow 处理器上错误率较以往方法降低约 40 倍，保留下来的态达到 99.99% 的逻辑保真度，成果发表于 Science。该方法会对每个态进行筛查并丢弃不合格尝试，仅约 8% 的尝试通过筛选，且仍需在更大规模上验证；作者称这是通往纠错量子计算机的一步。
Google achieved a new level in quantum computing.
Says it has cleared a bottleneck researchers have flagged since 2004.
Quantum computers need single-use “magic states” to run the operations that put them beyond ordinary computers.
Making clean ones is so costly that some estimates say it could take up to 95% of a machine’s capacity.
Google’s new method checks each state and throws out flawed attempts, cutting errors about 40x on its 105-qubit Willow chip.
The surviving states reached 99.99% accuracy, a record by Google’s count, in work published in Science today.
Only 8% of attempts survived the filter, and the method still has to work at much larger scale.
Google has shown on real hardware 1 of the methods behind its estimate that RSA-2048 encryption could be broken with under 1M qubits.
https://x.com/sundarpichai/status/2110804295352488143/video/1
Some magical progress towards "magic state" in quantum! Our @GoogleQuantumAI team has demonstrated "magic state cultivation" on physical hardware for the first time. The result is a 40x error reduction on our Willow processor vs. previous methods, achieving a state-of-the-art 99.99% logical fidelity. It's another step towards useful, error-corrected quantum computers to help solve the hardest problems. The result is published in Science today, watch the video below to see how it works在 X 查看被引用的帖子
来源：Rohan Paul · x.com