不可分离性和同时可读性
Nonseparability and simultaneous readability
摘要：
在这项研究中，我们研究了被观测系统和测量仪器之间的量子不可分离性，或多个测量仪器。我们表明，测量仪器的测量结果的物理意义，通过弱测量后选择与没有任何后选择的结果有很大的不同。在这项研究中，不可分离性起着至关重要的作用，这是相同的，在一个同时的常规冯诺依曼型测量的多个可观的。从这个观点出发，我们提出了一个新的概念，称为{ \it同时可读性}，这是一种可能性，多个测量仪器将同时给出被观察系统的正确信息。接下来，我们表明，即使电子与另一个电子具有EPR相关性，电子自旋的不同分量也不能同时测量。
英文摘要：
In this study, we investigate quantum nonseparability between an observed system and a measuring apparatus, or multiple measuring apparatuses. We show that the physical meaning of the outcome of the measuring apparatus obtained by weak measurement with a post-selection differs critically from that without any post-selection. In this study, the nonseparability plays the essential role, which is shown to be the same in a simultaneous conventional von Neumann-type measurement of multiple observables. From this viewpoint, we suggest a new concept, known as {\it simultaneous readability}, which is the possibility that multiple measuring apparatuses will give the proper information of the observed system simultaneously. Next, we show that different components of the spin of an electron are not simultaneously measurable even if it has EPR correlation with another electron.
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