Phys. Rev. Lett. 86, 2699–2703 (2001)From the Quantum Zeno to the Inverse Quantum Zeno EffectReceived 21 June 2000; published in the issue dated 26 March 2001 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. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.2699
DOI:
10.1103/PhysRevLett.86.2699
PACS:
03.65.Xp
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