Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 39: Poster: Quantum Optics and Photonics II

Q 39.1: Poster

Dienstag, 6. März 2018, 16:15–18:15, Zelt Ost

Rydberg quantum optics in ultracold gases — •Nina Stiesdal, Christoph Braun, Philipp Lunt, Simon Ball, Christoph Tresp, and Sebastian Hofferberth — Department of Physics, Chemistry and Pharmacy, SDU, Campusvej 55, 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. This approach forms the basis of a growing Rydberg quantum optics toolbox, which already contains photonic logic building-blocks such as single-photon sources, switches, transistors, and conditional pi-phase shifts [1].

Following our relocation from Universität Stuttgart to University of Southern Denmark, Odense, we present the new iteration of our experimental apparatus. We also present the recent demonstration of strong coherent interaction between a few-photon probe field and an effective two-level Rydberg ’superatom’ [2]. We further introduce our steps towards the formation of two such superatoms.

We discuss how the interference between the possible storage paths in Rydberg atoms and molecules affects the efficiency of storing and retrieving photons [3], and present our investigation of photon subtraction by many-body decoherence [4].

[1] O. Firstenberg et. al., J. Phys. B 49, 152003 (2016)

[2] A. Paris-Mandoki et. al., Phys. Rev. X 7, 41010 (2017)

[3] I. Mirgorodskiy et. al., Phys. Rev. A 69, 011402 (2017)

[4] C. R. Murray et. al., arXiv:1710.10047v1 (2017)