论文标题
在约束的自由意志和不完善的检测器下测试量子非局部相关性
Testing of quantum nonlocal correlations under constrained free will and imperfect detectors
论文作者
论文摘要
在这项工作中，我们处理标准局部逼真的隐藏变量（LRHV）不平等的两个中心假设的放松：选择测量设置时的自由意志，以及在测量设备上存在完美的检测器。违反LRHV不平等的量子相关性称为量子非局部相关性。原则上，在对抗性情况下，可能会在选择测量设置时引入隐藏的变量，但是无法访问该隐藏变量的观察者可能不会意识到偏见。但是，实际上，探测器没有完美的效率。本文的一个主要重点是引入框架，在该框架下，给定具有非局部行为的量子状态在约束的自由意志下，我们可以确定检测器参数的阈值（检测器效率低下和黑暗计数），以便检测器足够强大，足以证明非局部性。我们还引入了一类LRHV的不平等现象，其自由意志有限，我们讨论了它们在量子非局部相关性测试中的影响。
In this work, we deal with the relaxation of two central assumptions in standard locally realistic hidden variable (LRHV) inequalities: free will in choosing measurement settings, and the presence of perfect detectors at the measurement devices. Quantum correlations violating LRHV inequalities are called quantum nonlocal correlations. In principle, in an adversarial situation, there could be a hidden variable introducing bias in the selection of measurement settings, but observers with no access to that hidden variable could be unaware of the bias. In practice, however, detectors do not have perfect efficiency. A main focus of this paper is the introduction of the framework in which given a quantum state with nonlocal behavior under constrained free will, we can determine the threshold values of detector parameters (detector inefficiency and dark counts) such that the detectors are robust enough to certify nonlocality. We also introduce a class of LRHV inequalities with constrained free will, and we discuss their implications in the testing of quantum nonlocal correlations.
