Zeno's paradox in quantum theory

@inproceedings{Misra1976ZenosPI,
  title={Zeno's paradox in quantum theory},
  author={B. Misra and E. C. George Sudarshan},
  year={1976}
}
A quantum-theoretic expression is sought for the probability that an unstable particle prepared initially in a well-defined state will be found to decay sometime during a given interval. It is argued that probabilities like this which pertain to continuous monitoring possess operational meaning. A simple natural approach to this problem leads to the startling conclusion that an unstable particle which is continuously observed whether it decays will never be found to decay. Since recording the… 
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