Forbidden atomic transitions driven by an intensity-modulated laser trap

Kaitlin R. Moore (), Sarah E. Anderson and Georg Raithel
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Kaitlin R. Moore: University of Michigan
Sarah E. Anderson: University of Michigan
Georg Raithel: University of Michigan

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Spectroscopy is an essential tool in understanding and manipulating quantum systems, such as atoms and molecules. The model describing spectroscopy includes the multipole-field interaction, which leads to established spectroscopic selection rules, and an interaction that is quadratic in the field, which is not often employed. However, spectroscopy using the quadratic (ponderomotive) interaction promises two significant advantages over spectroscopy using the multipole-field interaction: flexible transition rules and vastly improved spatial addressability of the quantum system. Here we demonstrate ponderomotive spectroscopy by using optical-lattice-trapped Rydberg atoms, pulsating the lattice light and driving a microwave atomic transition that would otherwise be forbidden by established spectroscopic selection rules. This ability to measure frequencies of previously inaccessible transitions makes possible improved determinations of atomic characteristics and constants underlying physics. The spatial resolution of ponderomotive spectroscopy is orders of magnitude better than the transition frequency would suggest, promising single-site addressability in dense particle arrays for quantum computing applications.

Date: 2015
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DOI: 10.1038/ncomms7090

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