Zeno and anti-Zeno effects in two-level systems | Zendy

Alfredo Luis | Zendy

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Zeno and anti-Zeno effects in two-level systems

Author(s) -

Alfredo Luis

Publication year - 2003

Publication title -

physical review a

Language(s) - English

Resource type - Journals

eISSN - 1094-1622

pISSN - 1050-2947

DOI - 10.1103/physreva.67.062113

Subject(s) - zeno's paradoxes , quantum zeno effect , physics , unitary state , statistical physics , classical mechanics , quantum mechanics , quantum decoherence , quantum , law , epistemology , philosophy , political science

We examine the appearance of Zeno and anti-Zeno effects when the unitary evolution of a two-level system is observed. We demonstrate that, contrary to previous claims, the anti-Zeno effect can occur in two-level systems so that the observation can enhance the transition probability. Moreover, for nonresonant couplings we show that the Zeno and anti-Zeno effects always appear sequentially in the evolution of the same system: there is Zeno effect in the short-time regime and anti-Zeno effect in the long-time regime

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