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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster – Ultra-cold atoms, ions and BEC (joint session A/Q)

Q 64.22: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 1. OG

Towards continuous superradiance in Strontium-88 — •Ying Cui, Luuk Michels, Elisa Wenzel, Benedikt Heizenreder, Ananya Sitaram, and Florian Schreck — University of Amsterdam

Superradiance is a collective light-matter phenomenon with the potential of significantly enhancing the short-term stability of optical clocks. While pulsed superradiance has already been demonstrated, we envision a steady supply of ultracold atoms actively transported through the lasing region to achieve continuous operation. Here we present two sub-projects towards continuous superradiance on the millihertz line of Strontium-88. We plan to employ a bow-tie cavity to form a moving optical lattice that acts as a conveyor belt for transporting atoms from a reservoir into the emission region. The first objective is to couple and lock the cavity to this lattice light and to implement a probing setup that targets the 689 nm 1S0-3P1 transition in Strontium. A further key requirement is the controlled, yet incoherent preparation of atoms in the upper lasing state, preventing any imposed phase relation between the pump beams and the emitted superradiant field. To this end, we aim to develop and implement a multi-level pumping scheme, supported by a frequency and intensity stabilized repumping system integrated into the experiment.

Keywords: superradiance; strontium; cavity QED