Download as PDF Printable version. An explicit evaluation of these two competing requests shows that it is inappropriate, without taking into account this basic fact, to deal with the actual occurrence and emergence of Zeno's effect. BioSystems , Bibliographic Explorer What is the Explorer? That is,. Recall that for the two-level system, n takes the values 0 or 1. Bibcode : FoPh Quantum zeno effect in parameter estimation. Annals of Physics.