Tan, Walls, and Collett reply.
Tan, Walls, and Collett reply.
复制标题
谭、沃尔斯和科利特回答。
DOI：
10.1103/physrevlett.68.895
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发表时间：
1992
影响因子：
8.6
通讯作者：
Collett
中科院分区：
文献类型：
--
作者：
Tan;Walls;Collett
第一个条件将联合检测的概率与局部确定的单个检测的概率相关联，并且等价于等式：(2)在评论中。第二个条件是本地振荡器的相位影响零差检测器处的光电检测概率的方式的陈述。对于给定的一组参数，相位Hp的变化仅允许在检测器ck和dk之间重新分配检测概率，但不允许改变总检测概率。这与Clauser等人的”无增强假说”有关。[31.很容易看出，对于注释中给出的Pj（0; a，ek）的形式，该条件不满足，因为和Pj（Ak，Hk）+ Pgo.，ak，ek）取决于Hk的值。桑托斯的零差探测器必须以非概率守恒的方式工作，事实上对于某些A值。而H&将完全不能探测到入射光子。我们已经包括了（继Clauser等人和Grangier、Potasek和Yurke之后）在每个零差检测器内概率局部守恒的要求，作为局部性的经典概念的一部分;但正如桑托斯的例子所示，它可以被视为联合概率密度因式分解的一个附加假设。正如Grangier、Potasek和Yurke [2]在其文章的附录中所讨论的那样，上述两个条件足以保证使用强度相关系数的Bell不等式的形式得到满足。
The first condition relates the probability of a joint detec-tion to the locally determined probabilities of single detections and is equivalent to Eq.(2) in the Comment. The second condition is a statement of the way in which the phase of the local oscillator affects the photodetection probabilities at that homodyne detector. A change in the phase Hp for a given set of parameters is only permitted to redistribute the probabilities of detection between detectors ck and dk but is not allowed to change the total detection probability. This is related to the" no-enhancement hypothesis" of Clauser et al.[31. It is easy to see that for the form of PJ 0; a, ek) given in theComment, this condition is not fulfilled since the sum P,(A „ak, Hk)+ Pgo., ak, ek) depends on the value of Hk. Santos's homodyne detectors must function in a non-probability-conserving way, and in fact forsome values of A. and H& will completely fail to detect an incident photon. We had included (following Clauser et al. and Grangier, Potasek, and Yurke) the requirement of local conserva-tion of probability within each homodyne detector as part of the classical concept of locality; but as Santos's exam-ple shows itcan be regarded as an additional assumption to the factorization of the joint probability density. As discussed by Grangier, Potasek, and Yurke [2] in the ap-pendix to their article, the two conditions given above are sufficient to ensure that the form of Bell's inequality using intensity correlation coefficients is satisfied.