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Q: Fachverband Quantenoptik und Photonik

Q 35: Precision Spectroscopy of Atoms and Ions III (joint session A/Q)

Q 35.3: Vortrag

Mittwoch, 12. März 2025, 11:45–12:00, HS PC

Shelving spectroscopy of narrow UV transitions in dysprosium — •Kevin Ng¹, Paul Uerlings¹, Fiona Hellstern¹, Luis Weiß¹, Alexandra Köpf¹, Michael Wischert¹, Tanishi Verma¹, Stephan Welte^{1, 2}, Ralf Klemt¹, and Tilman Pfau¹ — ¹5. Physikalisches Institut and Center for Integrated Quantum Science and Technology IQST, Universität Stuttgart — ²CZS Center QPhoton

Current efforts in analogue quantum simulation aim to increase the interaction strengths between trapped particles in order to probe long-range interactions and correlations on the microscopic scale. By reducing the separation between dysprosium atoms trapped in optical lattices made from UV (~360nm) light, a large enhancement of the magnetic dipole-dipole interaction can be achieved, albeit with a higher required imaging resolution for quantum gas microscopy.

To implement imaging techniques that overcome the diffraction limit to resolve particles only 180nm apart, we plan to use long lived excited states trapped at magic wavelengths. Such knowledge of the ground and excited state atomic polarizabilities depend on the strength and positions of transitions in the vicinity of the trapping wavelength. Here, we present a characterization of multiple weak UV transitions in dysprosium on a thermal atomic beam. We measure isotope shifts, hyperfine splittings and lifetimes of such transitions by using the known strong 421nm transition as a probe, amplifying signal detection by a factor of ~600 compared to detection via standard absorption or fluorescence spectroscopy.

Keywords: dipolar; dysprosium; microscope; spectroscopy; ultraviolet