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arXiv · 1511.09445

Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned F\"orster Resonances

H. Gorniaczyk·C. Tresp·P. Bienias·A. Paris-Mandoki·W. Li·I. Mirgorodskiy·H. P. Büchler·I. Lesanovsky·S. Hofferberth
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Abstract

Mapping the strong interaction between Rydberg atoms onto single photons via electromagnetically induced transparency enables manipulation of light on the single photon level and novel few-photon devices such as all-optical switches and transistors operated by individual photons. Here, we demonstrate experimentally that Stark-tuned F\"orster 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 F\"orster 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.

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H. Gorniaczyk, C. Tresp, P. Bienias, A. Paris-Mandoki, W. Li, I. Mirgorodskiy, H. P. Büchler, I. Lesanovsky, S. Hofferberth. 2015-11-30. Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned F\"orster Resonances. https://doi.org/10.1038/ncomms12480

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