Bonn 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MO: Fachverband Molekülphysik

MO 12: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

MO 12.5: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Interfacing high overtone bulk acoustic wave resonators and Rydberg atoms in a 4K environment — •Samuel Germer, Valerie Mauth, Cedric Wind, Julia Gamper, Wolfgang Alt, and Sebastian Hofferberth — Institute of Applied Physics, University of Bonn, Germany

Rydberg atoms possess electric dipole transitions over a large range of the electromagnetic spectrum and are therefore promising candidates for realizing hybrid quantum systems that bridge the microwave and optical regimes. We aim to realize such a hybrid system in which an electromechanical resonator mode can be cooled down to its quantum mechanical ground state via interactions with Rydberg atoms.

On this poster, we discuss the setup build of three parts, the magneto optical trap for Rubidium atoms, an ultra high vacuum chamber hosting the atom chip in a closed-cycle cryostat and a magnetic transport connecting both. The cryostat provides a 4K environment which is a prerequisite for cooling the high overtone bulk acoustic wave resonator (HBAR) close to its ground state and allows the use of superconducting components.

We present machine learning based optimization of the magneto optical trap and magnetic transport. Moreover, a first generation chip, consisting of a superconducting Z-wire trap and a microwave resonator, has been fabricated and characterization measurements are shown. For a second generation atom chip, featuring the HBAR, first simulations are presented which allow, among other things, to estimate the coupling strength between Rydberg atoms and the resonator.

Keywords: Rydberg Atoms; Hybrid Systems; Cryostat; Electromechanical resonator; Machine-Learning Online Optimization