Microscopic Control and Detection of Ultracold Strontium in Optical-Tweezer Arrays

Author
Abstract
Optical tweezers provide a versatile platform for the manipulation and detection of single atoms. Here, we use optical tweezers to demonstrate a set of tools for the microscopic control of atomic strontium, which has two valence electrons. Compared to the single-valence-electron atoms typically used with tweezers, strontium has a more complex internal state structure with a variety of transition wavelengths and linewidths. We report single-atom loading into an array of subwavelength scale optical tweezers and light-shift-free control of a narrow-linewidth optical transition. We use this transition to perform three-dimensional ground-state cooling and to enable high-fidelity nondestructive imaging of single atoms on subwavelength spatial scales. These capabilities, combined with the rich internal structure of strontium, open new possibilities including tweezer-based metrology, new quantum computing architectures, and new paths to low-entropy many-body physics.
Year of Publication
2018
Journal
Physical Review X
Volume
8
Date Published
2018-12
URL
https://journals.aps.org/prx/abstract/10.1103/PhysRevX.8.041054
DOI
10.1103/PhysRevX.8.041054
JILA PI
Associated Institutes
Journal Article