中国科大实现噪声适应的量子精密测量

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lufan 2019-11-08 00:51

中国科大实现噪声适应的量子精密测量

mang2004 2019-11-08 00:56

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Quantum systems can be exploited for disruptive technologies but in practice quantum features are fragile due to noisy environments. Quantum coherence, a fundamental such feature, is a basis-dependent property that is known to exhibit a resilience to certain types of Markovian noise. Yet, it is still unclear whether this resilience can be relevant in practical tasks. Here, we experimentally investigate the resilient effect of quantum coherence in a photonic Greenberger-Horne-Zeilinger state under Markovian bit-flip noise, and explore its applications in a noisy metrology scenario. In particular, using up to six-qubit probes, we demonstrate that the standard quantum limit can be outperformed under a transversal noise strength of approximately equal magnitude to the signal, providing experimental evidence of metrological advantage even in the presence of uncorrelated Markovian noise. This work highlights the important role of passive control in noisy quantum hardware, which can act as a low-overhead complement to more traditional approaches such as quantum error correction, thus impacting on the deployment of quantum technologies in real-world settings. `w@:h4f  
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tassy 2019-11-08 02:24

中国科大实现噪声适应的量子精密测量.

likaihit 2019-11-08 03:30

真的好牛逼啊

redplum 2019-11-08 03:32

看不懂啊

1014597 2019-11-08 05:38

实现噪声适应的量子精密测量

刘明欢聪慧 2019-11-08 06:26

中国科大实现噪声适应的量子精密测量

tomryo 2019-11-08 07:38

:中国科大实现噪声适应的量子精密测量

从业者007 2019-11-08 07:52

中国科学院院士、中国科学技术大学教授郭光灿团队验证了纠缠态的相干性对横向噪声的适应性，并进一步验证在横向噪声中纠缠态探针的量子测量精度仍可超越标准量子极限。

songyang1169 2019-11-08 08:02

中国科学院院士、中国科学技术大学教授郭光灿团队在量子相干和量子精密测量研究中取得新进展。该团队李传锋、黄运锋研究组与英国合作者在线性光学系统中实验验证了纠缠态的相干性对横向噪声的适应性，并进一步验证在横向噪声中纠缠态探针的量子测量精度仍可超越标准量子极限。该项研究成果11月1日发表在国际物理学期刊《物理评论快报》上