The history of quantum computing has been marked by a series of breakthroughs at the frontiers of materials and computer science. Applying the principles of quantum mechanics to build computers capable of delivering almost unimaginable leaps in performance over today’s machines has preoccupied scientists for more than 40 years. For all that, practical quantum computers have remained tantalisingly out of reach. News of a breakthrough this week suggests the finish line may finally be coming into sight, potentially opening the way to the first practical machines around the turn of the decade.
量子计算的历史以材料科学和计算机科学前沿的一系列突破为标志。40多年来，科学家们一直致力于将量子力学原理应用于计算机的构建，以实现比现今机器性能几乎不可想象的飞跃。尽管如此，实用的量子计算机仍然遥不可及。本周的突破性新闻表明，终点线可能终于开始显现，可能在十年之交开启通向首批实用机器的道路。
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