Google Willow 处理器实现 99.99% 保真度量子态制备
Google 在 Willow 芯片上把量子态保真度做到 99.99%，离能用容错量子计算机又近一步。
Google 在 Willow 量子处理器上展示了 magic state cultivation 方法，制备量子态的错误率比不使用该方法低约 40 倍，保真度达到约 99.99%。这类量子态是容错量子计算中消耗性资源，能否高效制备是实用化量子计算机的主要瓶颈之一。该进展有望用于模拟复杂分子中的电子相互作用，帮助研究化学反应、催化剂和材料性质。
Crazy that most people missed that but Google has demonstrated a quantum computing breakthrough that could bring complex chemistry and materials simulations closer to practical use.
On its Willow processor, researchers report producing essential quantum states with around 40× lower error than preparation without “magic state cultivation,” reaching approximately 99.99% fidelity. These states are consumed during computation. Producing enough reliable ones is one of the biggest resource bottlenecks in building useful, error-corrected quantum computers.
Google has now demonstrated on hardware a method designed to reduce that problem.
For science, the potential is very very significant: calculating how electrons interact in complex molecules and materials, helping researchers investigate chemical reactions, catalysts and properties that remain difficult to model accurately with classical computers.
