Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 13, Pages 2699-2703Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.2699
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The temporal evolution of an unstable quantum mechanical system undergoing repeated measurements is investigated. In general, by changing the time interval between successive measurements, the decay can be accelerated (inverse quantum Zeno effect) or slowed down (quantum Zeno effect), depending on the features of the interaction Hamiltonian. A geometric criterion is proposed for a transition to occur between these two regimes.
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