弱测量中观测到的复联合概率能为量子物理学提供何种启示
量子物理
2015-02-25 v1 物理学史与哲学
摘要
量子力学不允许对非对易可观测量进行联合测量。然而，可以先测量投影算符的弱值，随后对另一不同性质进行精确测量。其结果可被解释为两个非对易测量结果的复联合概率。值得注意的是，通过将初态的联合概率与关联新测量和量子态表征中所用测量结果可能组合的复条件概率相结合，能够预测完全不同测量的结果。因此我们可以得出结论：弱测量中观测到的复条件概率描述了非对易性质之间与态无关的基本关系，这代表了量子物理学中最基本的普适定律形式。
引用
@article{arxiv.1303.0078,
title = {What the complex joint probabilities observed in weak measurements can tell us about quantum physics},
author = {Holger F. Hofmann},
journal= {arXiv preprint arXiv:1303.0078},
year = {2015}
}
备注
This short note (2 pages) is a contribution to the proceedings of QCMC 2012 held in Vienna, Austria, July 30th to August 3rd 2012. It is intended as a short motivational discussion of the significance that recent results on complex probabilities might have for our general understanding of the laws of physics