Zeno and anti-Zeno effects in two-level systems
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 no...
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| Format: | article |
| Publication Date: | 2003 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/51521 |
| Online Access: | https://hdl.handle.net/20.500.14352/51521 |
| Access Level: | Open access |
| Keyword: | 535 Intermittent atomic fluorescence Quantum zeno Single-atom Down-conversion Dark periods Paradox Jumps Dynamics Collapse Light Óptica (Física) 2209.19 Óptica Física |
| Summary: | 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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