Popper's Experiment and Conditional Uncertainty Relations
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- Short, A.J. Found Phys Lett (2001) 14: 275. doi:10.1023/A:1012238227977
Application of the uncertainty principle to conditional measurements is investigated and found to be valid for measurements on separated sub-systems. In light of this, an apparent violation of the uncertainty principle obtained by Kim and Shih in their realization of Popper's experiment  is explained through analogy with a simple optical system.