Multipartite steering verification with imprecise measurements

• URL: http://arxiv.org/abs/2511.07708v1
• Date: Wed, 12 Nov 2025 01:12:22 GMT
• Title: Multipartite steering verification with imprecise measurements
• Authors: Zeyang Lu, Chan Li, Gang Wang, Zhu Cao,
• Abstract summary: Quantum steering is a fundamental quantum correlation that plays a pivotal role in quantum technologies.<n>We develop a quantitative method that effectively eliminates false positives induced by measurement imprecision.<n>Results substantially enhance the robustness of multipartite steering and entanglement verification against measurement imprecision.
• Score: 4.408612042177465
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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