Improving the state selectivity of field ionization with quantum control
| Autor: | Zoe A. Rowley, Bianca R. Gualtieri, Michael W. Noel, Thomas J. Carroll, Zhimin Cheryl Liu, Ankitha Kannad, Jason J. Bennett, Vincent C. Gregoric |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Field (physics) Atomic Physics (physics.atom-ph) FOS: Physical sciences 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas symbols.namesake Stark effect Ionization Field desorption 0103 physical sciences Rydberg atom Physics::Atomic and Molecular Clusters symbols Rydberg formula Energy level Physics::Atomic Physics Atomic physics Rydberg state 010306 general physics |
| Zdroj: | Physical Review A. 98 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.98.063404 |
| Popis: | The electron signals from the field ionization of two closely-spaced Rydberg states of \mbox{rubidium-85} are separated using quantum control. In selective field ionization, the state distribution of a collection of Rydberg atoms is measured by ionizing the atoms with a ramped electric field. Generally, atoms in higher energy states ionize at lower fields, so ionized electrons which are detected earlier in time can be correlated with higher energy Rydberg states. However, the resolution of this technique is limited by the Stark effect. As the electric field is increased, the electron encounters numerous avoided Stark level crossings which split the amplitude among many states, thus broadening the time-resolved ionization signal. Previously, a genetic algorithm has been used to control the signal shape of a single Rydberg state. The present work extends this technique to separate the signals from the $34s$ and $33p$ states of rubidium-85, which are overlapped when using a simple field ramp as in selective field ionization. |
| Databáze: | OpenAIRE |
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