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Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 42: Poster: Quantum Optics and Photonics II

Q 42.16: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Atrium Informatik

Experimental observation of nonlinearity enhancement induced by interactions in Rydberg-EIT medium — •Clément Hainaut1, Annika Tebben1, Valentin Walther2, Yongchang Zhang2, Renato Ferracini Alves1, Andre Salzinger1, Nithiwadee Tchaicharoen1, Gerhard Zürn1, Thomas Pohl2, and Matthias Weidemüller1,31Physikalisches Institut, Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany — 2Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark — 3Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China

The strong light-matter coupling of a Rydberg gas under Electromagnetically Induced Transparency (EIT) conditions enabled the realization of strong effective photon-photon interaction leading to high nonlinearities at the single photon level opening promising route towards all-optical quantum information processing. In this work, we present a new way to enhance the nonlinearities in a Rydberg-EIT medium.

The usual way to describe a Rydberg-EIT medium consist to solve the system Maxwell-Bloch equation performing an adiabatic elimination of the short lived exited state. This leads to a theory describing well the physical effects where the Rabi frequency of the control beam Ωc is larger than the probe detuning Δp. In this work, we develop a theory which explicitly includes the intermediate state capturing thus the physical phenomena where Ωc ≤ Δp . Doing so we uncover a new resonance feature for Ωc = Δp induced by interactions. We report on experimental observations of this resonance.

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