Luis Aina, AlfredoSánchez Soto, Luis Lorenzo2023-06-202023-06-201999-071050-294710.1103/PhysRevA.60.56https://hdl.handle.net/20.500.14352/59686©1999 The American Physical SocietyWe examine the evolution of a two-level atom when its population is monitored. The detection proposed is an interaction-fret measurement, so that the observation occurs without photon exchange between the atom and the apparatus. It is shown that the observed dynamics exhibits features that an isolated two-level atom cannot accommodate. Such phenomena are explained in terms of an atom-apparatus effective interaction.engjournal articlehttp://dx.doi.org/10.1103/PhysRevA.60.56http://journals.aps.org/open access535Quantum zenoField statesParadoxJumpsDecoherenceRealizationCollapseÓptica (Física)2209.19 Óptica Física