Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics II
Q 42.16: Poster
Mittwoch, 13. März 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 Weidemüller1,3 — 1Physikalisches 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.