Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances

H. Gorniaczyk (), C. Tresp, P. Bienias, A. Paris-Mandoki, W. Li, I. Mirgorodskiy, H. P. Büchler, I. Lesanovsky and S. Hofferberth ()
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H. Gorniaczyk: 5th Institute of Physics and Center for Integrated Quantum Science and Technology, Universität Stuttgart
C. Tresp: 5th Institute of Physics and Center for Integrated Quantum Science and Technology, Universität Stuttgart
P. Bienias: Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, Universität Stuttgart
A. Paris-Mandoki: 5th Institute of Physics and Center for Integrated Quantum Science and Technology, Universität Stuttgart
W. Li: School of Physics and Astronomy, University of Nottingham
I. Mirgorodskiy: 5th Institute of Physics and Center for Integrated Quantum Science and Technology, Universität Stuttgart
H. P. Büchler: Institute for Theoretical Physics III and Center for Integrated Quantum Science and Technology, Universität Stuttgart
I. Lesanovsky: School of Physics and Astronomy, University of Nottingham
S. Hofferberth: 5th Institute of Physics and Center for Integrated Quantum Science and Technology, Universität Stuttgart

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract Mapping the strong interaction between Rydberg atoms onto single photons via electromagnetically induced transparency enables manipulation of light at the single-photon level and few-photon devices such as all-optical switches and transistors operated by individual photons. Here we demonstrate experimentally that Stark-tuned Förster resonances can substantially increase this effective interaction between individual photons. This technique boosts the gain of a single-photon transistor to over 100, enhances the non-destructive detection of single Rydberg atoms to a fidelity beyond 0.8, and enables high-precision spectroscopy on Rydberg pair states. On top, we achieve a gain larger than 2 with gate photon read-out after the transistor operation. Theory models for Rydberg polariton propagation on Förster resonance and for the projection of the stored spin-wave yield excellent agreement to our data and successfully identify the main decoherence mechanism of the Rydberg transistor, paving the way towards photonic quantum gates.

Date: 2016
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DOI: 10.1038/ncomms12480

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