SAMOP 2023 – wissenschaftliches Programm
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.