The primary challenge in advancing practical quantum technology is the presence of noise, which can lead to decoherence and undermine the advantages of quantum systems. However, it is worth noting that noise can also contain information that can be harnessed to improve performance in certain quantum information tasks. This has been explored for specific types of noise, but the full potential of informative noise within general dynamics remains largely unknown. Here we demonstrate that informative noise can be transformed into a valuable resource for enhancing precision limits in quantum metrology. We provide necessary and sufficient conditions under which the precision achieved in the presence of informative noise can attain Heisenberg scaling. Our research offers a fresh perspective on the role of noise in quantum metrology and opens up avenues for achieving higher precision beyond the previously anticipated ultimate limit.

中文翻译：

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通过利用信息噪声和纠错来增强量子计量


推进实用量子技术的主要挑战是噪声的存在，这可能导致退相干并破坏量子系统的优势。然而，值得注意的是，噪声也可能包含可用于提高某些量子信息任务性能的信息。这已经针对特定类型的噪声进行了探索，但信息噪声在一般动力学中的全部潜力在很大程度上仍然未知。在这里，我们证明了信息噪声可以转化为提高量子计量精度极限的宝贵资源。我们提供了必要和充分的条件，在存在信息噪声的情况下实现的精度可以达到海森堡标度。我们的研究为噪声在量子计量中的作用提供了新的视角，并为实现超越先前预期的极限的更高精度开辟了途径。