标题： 相位测量的熵：通过正交测量的量子相位 显示英文标题

标题： Entropy of phase measurement: Quantum phase via quadrature measurement

摘要： 相位敏感测量的相位信息内容通过最大似然估计进行评估。 相位分布由相对熵表征——这是输入量子态的非线性泛函。 作为一个具体例子，对正交算符的多次测量被解释为量子相位检测，实现了由费舍尔信息预测的最终分辨率。 显示英文摘要

摘要： The content of phase information of an arbitrary phase--sensitive measurement is evaluated using the maximum likelihood estimation. The phase distribution is characterized by the relative entropy--a nonlinear functional of input quantum state. As an explicit example the multiple measurement of quadrature operator is interpreted as quantum phase detection achieving the ultimate resolution predicted by the Fisher information.