SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 22: Poster II

Q 22.61: Poster

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

Rydberg superatoms for waveguide QED — •Nina Stiesdal¹, Lukas Ahlheit¹, Anna Spier¹, Jan de Haan¹, Kevin Kleinbeck², Jan Kumlin³, Hans-Peter Büchler², and Sebastian Hofferberth¹ — ¹IAP, University of Bonn — ²ITP3, University of Stuttgart — ³CCQ, Aarhus University

Waveguide-systems where quantum emitters are strongly coupled to a single propagating light mode offer an interesting platform for quantum nonlinear optics. We work towards realizing a cascaded system in free space by using Rydberg superatoms - single Rydberg excitations in individual atomic ensembles smaller than the Rydberg blockade-volume - as directional effective two-level systems.

On this poster we show our setup implementing a one-dimensional chain of Rydberg superatoms with low internal dephasing. We employ a double magic-wavelength optical lattice to pin atoms during optical experiments using Rydberg states and thus reduce motional dephasing of the collective excitation. We further show our interferometer setup for obtaining phase information about the photons to perform full state tomography of outgoing multi-photon pulses to characterize the effective photon-photon interaction mediated by the superatom chain.