近日，同济大学曹竹团队研究了不精确测量下的多方转向验证。该项研究成果发表在2025年10月27日出版的《物理评论A》杂志上。

量子转向是一种基本的量子相关性，在量子技术中起着关键作用，但它的验证关键依赖于精确的测量——这一假设经常被实际的不完善所破坏。

课题组研究了不精确测量下的多方转向验证，并开发了一种定量方法，有效地消除了测量不精确引起的误报。与设备无关方法的比较表明，他们的方法准确地描述了有效验证的范围。在一个特殊的情况下，他们的方法也可以在非理想条件下验证多部纠缠。这些结果大大提高了多方导向和纠缠验证对不精确测量的有效性，从而促进了其在现实量子技术中的适用性。

附：英文原文

Title: Multipartite steering verification with imprecise measurements

Author: Zeyang Lu, Chan Li, Gang Wang, Zhu Cao

Issue&Volume: 2025/10/27

Abstract: Quantum steering is a fundamental quantum correlation that plays a pivotal role in quantum technologies, but its verification crucially relies on precise measurements—an assumption often undermined by practical imperfections. Here, we investigate multipartite steering verification under imprecise measurements and develop a quantitative method that effectively eliminates false positives induced by measurement imprecision. A comparison with a device-independent approach demonstrates that our method accurately delineates the scope of valid verification. In a special case, our method also enables the verification of multipartite entanglement under nonideal conditions. These results substantially enhance the robustness of multipartite steering and entanglement verification against measurement imprecision, thereby promoting their applicability in realistic quantum technologies.

DOI: 10.1103/v4yv-zvsc

Source: https://journals.aps.org/pra/abstract/10.1103/v4yv-zvsc