Weak measurements and the joint estimation of phase and phase diffusion
Weak measurements and the joint estimation of phase and phase diffusion
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DOI：
10.1103/physreva.92.032114
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发表时间：
2015-09-11
影响因子：
2.9
通讯作者：
Barbieri, Marco
中科院分区：
文献类型：
--
作者：
Altorio, Matteo;Genoni, Marco G.;Barbieri, Marco
弱测量提供了调整系统上获得的信息的可能性，因此施加的干扰。这表明，当两个参数不能在量子极限下同时测量时，它可能是一个有用的多参数估计工具。在这里，我们讨论它们在偏振法背景下在相扩散存在的情况下用于相位估计，在许多相关情况下，这种情况很方便地用两能级量子系统来描述。
Weak measurements offer the possibility of tuning the information acquired on a system, hence the imposed disturbance. This suggests that it could be a useful tool for multiparameter estimation, when two parameters cannot be measured simultaneously at the quantum limit. Here we discuss their use for phase estimation in the presence of phase diffusion in the context of polarimetry, a scenario that is conveniently cast in terms of a two-level quantum system in many relevant cases.