Operations, disturbance, and simultaneous measurability
Operations, disturbance, and simultaneous measurability
复制标题
操作、干扰和同时可测量性
DOI：
10.1103/physreva.63.032109
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发表时间：
2000
影响因子：
2.9
通讯作者：
M. Ozawa
中科院分区：
文献类型：
--
作者：
M. Ozawa
量子力学预言了对易观测量同时测量的结果的联合概率分布，但目前的公式缺乏同时测量的操作定义。为了在一般的理论框架内为纠缠系统的局部一般测量的联合统计提供依据，回答了在什么条件下两个测量装置的输出满足它们的可观测量同时测量的联合概率公式的问题.为此目的，所有可能的状态变化所造成的测量的可观察的特征，并在测量中的干扰的概念是正式的操作由测量的相互作用。
Quantum mechanics predicts the joint probability distributions of the outcomes of simultaneous measurements of commuting observables, but the current formulation lacks the operational definition of simultaneous measurements. In order to provide foundations of joint statistics of local general measurements on entangled systems in a general theoretical framework, the question is answered as to under what condition the outputs of two measuring apparatuses satisfy the joint probability formula for simultaneous measurements of their observables. For this purpose, all the possible state changes caused by measurements of an observable are characterized, and the notion of disturbance in measurement is formalized in terms of operations derived by the measuring interaction.