Observation of a large, resonant, cross-Kerr nonlinearity in a cold Rydberg gas

We report the experimental observation of a cross-Kerr nonlinearity in a free-space medium based on resonantly excited, interacting Rydberg atoms and electromagnetically induced transparency. The nonlinearity is used to implement cross-phase modulation between two optical pulses. The nonlinear phase...

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Veröffentlicht in:Physical review research 2019-12, Vol.1 (3), p.033193, Article 033193
Hauptverfasser: Sinclair, Josiah, Angulo, Daniela, Lupu-Gladstein, Noah, Bonsma-Fisher, Kent, Steinberg, Aephraim M.
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Sprache:eng
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Zusammenfassung:We report the experimental observation of a cross-Kerr nonlinearity in a free-space medium based on resonantly excited, interacting Rydberg atoms and electromagnetically induced transparency. The nonlinearity is used to implement cross-phase modulation between two optical pulses. The nonlinear phase written onto the probe pulse is measured to be as large as 8 mrad per nanowatt of signal power, corresponding to a χ^{(3)} of 10^{−8}m^{2}/V^{2}. Potential applications range from optical quantum information processing to quantum nondemolition measurement of photon number.
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.1.033193