Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 28: Poster – Quantum Optics
Q 28.3: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG
Cavity QED experiments and lasing with cold trapped Yb atoms — •Ke Li1, Saran Shaju1, Dmitriy Sholokhov1, Simon B. Jäger2, and Jürgen Eschner1 — 1Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken, Germany — 2Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
Cavity quantum electrodynamics with cold atoms enables highly controlled interaction between atoms and photons, offering advanced applications in quantum technologies and fundamental science. In our research, 104 to 106 174Yb atoms are magneto-optically trapped, using the 1S0 − 1P1 transition at 399 nm, inside a high-finesse cavity that couples to the 1S0 − 3P1 intercombination transition at 556 nm. We have observed continuous lasing action in both single- and multi-mode emission [1]. When the atoms are magneto-optically trapped on the 556-nm transition, the collective strong coupling leads to complex atom-field dynamics and scattering phenomena, including vacuum Rabi splitting accompanied by additional fluorescence at atomic resonance [2]. Future research will be extended to interactions on the 1S0 − 3P0 clock transition at 578 nm.
[1] H. Gothe et al., Phys. Rev. A 99, 013415 (2019).
[2] S. Shaju et al., Phys. Rev. A 112, 013705 (2025).
Keywords: Cavity qed; Many-body quantum system; Cold atom lasing; Optical clocks