论文标题
在存在强度测量依赖性的情况下量子非局部性
Quantum nonlocality in presence of strong measurement dependence
论文作者
论文摘要
众所周知，即使放宽了测量独立性的假设，即使允许源与测量设置的选择部分相关，量子非局部性的影响也可以观察到违反贝尔不平等的影响。但是观察量子非局部性所需的测量独立性最小是多少？在这里，我们探讨了这个问题，并考虑具有较强测量依赖性区域的模型，其中几乎在贝尔测试的几乎所有回合中都可以完美地确定测量选择。但是，我们表明在这种情况下仍然可以观察到量子非局部性，在我们使用的框架中，我们认为这是最小的。我们还讨论了随机扩增中的潜在应用。
It is well known that the effect of quantum nonlocality, as witnessed by violation of a Bell inequality, can be observed even when relaxing the assumption of measurement independence, i.e. allowing for the source to be partially correlated with the choices of measurement settings. But what is the minimal amount of measurement independence needed for observing quantum nonlocality? Here we explore this question and consider models with strong measurement-dependent locality, where measurement choices can be perfectly determined in almost all rounds of the Bell test. Yet, we show that quantum nonlocality can still be observed in this scenario, which we conjecture is minimal within the framework we use. We also discuss potential applications in randomness amplification.
