Improving the state selectivity of field ionization with quantum control

Abstract

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.

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Cited by in corpus (5)

• Realizing Su-Schrieffer-Heeger topological edge states in Rydberg-atom synthetic dimensions
• Primary quantum thermometry of mm-wave blackbody radiation via induced state transfer in Rydberg states of cold atoms
• Time dependence of few-body Förster interactions among ultracold Rydberg atoms
• Quantum Many-Body Scars in Few-Body Dipole-Dipole Interactions
• Perturbed Field Ionization for Improved State Selectivity