Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Ultracold Plasmas and Rydberg Systems I (joint session Q/A)
A 4.3: Vortrag
Montag, 5. März 2018, 11:15–11:30, K 2.013
Free-Space Quantum Electrodynamics with Rydberg Superatoms — •Simon Ball1, Christoph Tresp1, Nina Stiesdal1, Asaf Paris-Manodki2, Jan Kumlin3, Philipp Lunt1, Christoph Braun1, Hans Peter Büchler3, and Sebastian Hofferberth1 — 1Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense, Denmark — 2Instituto de Física, Universidad Nacional Autónoma de México, Mexico City 04510 Mexico — 3Institut für Theoretische Physik III and Center for Integrated Quantum Science and Technology, Universität Stuttgart, 70569 Stuttgart, Germany
Achieving significant coupling between single photon and single atom in free space is challenging. Finding ways to increase the coupling strength has brought about cavity, circuit and more recently waveguide QED, where the electromagnetic wave is either trapped or transversely confined. We present the coherent interaction of a single Rydberg superatom interacting with a propagating, single mode, few-photon light field. Due to the collective nature of the excitation, the superatom inherits the light field’s phase-relation and emits only in forward direction.[1] This property can be utilized to implement a dissipative spin chain, where the interaction between the individual spins is consecutively mediated by unidirectional travelling individual photons.
[1] A. Paris-Mandoki, C. Braun, J. Kumlin, C. Tresp, I. Mirgorodskiy, F. Christaller, H. P. Büchler, and S. Hofferberth, Phys. Rev. X 7, 41010 (2017).