不假设酉可观测量的两量子比特最大纠缠态的稳健自测试
Robust self-test of the maximally entangled state of two-qubits without assuming unitary observables
- University of Warsaw（华沙大学）
- Universidade Estadual Paulista（圣保罗州立大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
研究不假设酉可观测量的两量子比特最大纠缠态的稳健自测试问题，通过规避测量装置的扩张，对物理非投影算子进行正则化并得出解析稳健性界限。
AI中文摘要：
标准的与设备无关的自测试使用奈马克扩张来假设投影测量，掩盖了现实非酉可观测量的操作限制。我们为单重态和泡利可观测量建立了一个稳健的纯自测试，完全规避了测量装置的扩张。假设一个纯态来模拟不可信源，我们对物理非投影算子进行正则化，并得出一个解析的\(\mathcal{O}(\sqrt{\epsilon})\)稳健性界限。我们的结果表明，与标准投影模型相比，对实际实现进行与设备无关的认证要求要高得多。
英文摘要：
Standard device-independent self-testing uses Naimark dilation to assume projective measurements, masking the operational limitations of realistic non-unitary observables. We establish a robust pure self-test for the singlet and Pauli observables that entirely circumvents dilation of the measurement apparatus. Assuming a pure state to model an untrusted source, we regularize the physical non-projective operators and derive an analytic $\mathcal{O}(\sqrtε)$ robustness bound. Our results suggest that device-independent certification of real implementations is significantly more demanding than standard projective models imply.
