Complex weak values in quantum measurement
Complex weak values in quantum measurement
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DOI：
10.1103/physreva.76.044103
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发表时间：
2007-10-01
影响因子：
2.9
通讯作者：
Jozsa, Richard
中科院分区：
文献类型：
--
作者：
Jozsa, Richard
在Aharonov的弱值形式主义中，任何可观测A的弱值A（w）通常是一个复数。我们从测量指针的平均位置和平均动量的变化中得出其值的物理解释。特别是，我们表明，平均位置偏移包含一个项共同成比例的虚部的弱值和指针在空间中传播的速度，因为它进入测量相互作用。
In the weak value formalism of Aharonov , the weak value A(w) of any observable A is generally a complex number. We derive a physical interpretation of its value in terms of the shift in the measurement pointer's mean position and mean momentum. In particular, we show that the mean position shift contains a term jointly proportional to the imaginary part of the weak value and the rate at which the pointer is spreading in space as it enters the measurement interaction.