Quantum Optics Theory Group, Universität Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
Phys Rev Lett. 2018 Dec 21;121(25):250506. doi: 10.1103/PhysRevLett.121.250506.
Device-independent certification refers to the characterization of an apparatus without reference to the internal description of other devices. It is a trustworthy certification method, free of assumption on the underlying Hilbert space dimension and on calibration methods. We show how it can be used to quantify the quality of a Bell-state measurement, whether deterministic, partial, or probabilistic. Our certification is noise resistant and opens the way towards the device-independent self-testing of Bell-state measurements in existing experiments.
设备无关认证是指在不参考其他设备内部描述的情况下对设备进行的特征描述。它是一种值得信赖的认证方法,不依赖于底层希尔伯特空间维度和校准方法。我们展示了如何使用它来量化贝尔态测量的质量,无论是确定性的、部分的还是概率性的。我们的认证具有抗噪声能力,并为现有实验中贝尔态测量的设备无关自测试开辟了道路。