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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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2003 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/51521 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/51521 |
| Access Level: | acceso abierto |
| Palabra clave: | 535 Intermittent atomic fluorescence Quantum zeno Single-atom Down-conversion Dark periods Paradox Jumps Dynamics Collapse Light Óptica (Física) 2209.19 Óptica Física |
| Sumario: | 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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