SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Poster II

Q 22.60: Poster

Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof

Cryogenic system for Rydberg quantum optics — •Cedric Wind, Julia Gamper, Valerie Mauth, Florian Pausewang, Tore Homeyer, Hannes Busche, and Sebastian Hofferberth — Institute of Applied Physics, Bonn, Germany

Thanks to their strong interactions, Rydberg atoms are a key to neutral atom quantum simulation and computing or to implement nonlinear single photon devices such as single photon sources, optical transistors or photon-photon gates based on Rydberg quantum optics. Rydberg atoms also offer electric transitions over a wide range of the electromagnetic spectrum ranging from optical transitions close to the ground state to strong microwave transitions between Rydberg states. These properties make them an attractive ingredient to implement hybrid quantum systems interfacing optical and microwave frequencies.

Here, we present our design and construction of a cryogenic setup producing ultracold atoms in a 4K-environment to implement hybrid systems including Rydberg atoms. The system combines a closed-cycle cryostat with vibration isolation and an ultracold-atom production setup starting with a room-temperature magneto-optical trap and a magnetic transport into the cryo-region. In particular, the whole system is designed to enable fast exchange and cooling of samples in the experiment region to 4 K which can include electromechanical oscillators, superconducting circuits, or integrated photonic circuits. The cryostat promises a strong suppression of black-body induced Rydberg decay and improved vacuum conditions thanks to cryo-pumping that eliminates the need to bake the system when changing samples.