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A: Fachverband Atomphysik
A 31: Poster Session III
A 31.25: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG1
Rydberg Quantum Optics in Ultracold Gases — •Christoph Braun1,2, Florian Christaller1,2, Christoph Tresp1,2, Ivan Mirgorodskiy1, Asaf Paris-Mandoki1, and Sebastian Hofferberth1,2 — 15. Phys. Inst. and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — 2Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, 5230 Odense M, Denmark
Mapping the strong interaction between Rydberg excitations in ultracold atomic ensembles onto single photons enables the realization of optical nonlinearities which can modify light on the level of individual photons.
We present the use of an electrically tuned Förster-resonance to enhance the Rydberg-mediated interaction between single-photons. The strong interaction in the vicinity of a Förster-resonance allows performing fine-structure-resolving spectroscopy of the involved Rydberg pair-states.
We also show that an atomic medium smaller than the blockade radius can be utilized to substract exactly one photon from an input pulse over a wide range of input photon-numbers, thus the absorption of a single photon renders the medium from opaque to transperant. Reduced dephasing enables the observation of coherent Rabi-Oscillations of a single “super-atom” interacting with a light field close to the single-photon level.