Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 76: Ultracold Plasmas and Rydberg Systems IV (with A)

Q 76.5: Vortrag

Freitag, 27. März 2015, 15:30–15:45, P/H2

Single-Photon Transistor Based on Rydberg Blockade — •Daniel Tiarks, Simon Baur, Katharina Schneider, Stephan Dürr, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Garching, Deutschland

An all-optical transistor is a device in which a gate light pulse switches the transmission of a target light pulse with a gain above unity. The gain quantifies the change of the transmitted target photon number per incoming gate photon. In Refs. [1,2], we study the quantum limit of one incoming gate photon and observe a gain of 20. The gate pulse is stored as a Rydberg excitation in an ultracold gas. The transmission of the subsequent target pulse is suppressed by Rydberg blockade which is enhanced by a Förster resonance. The detected target photons reveal in a single shot with a fidelity above 0.86 whether a Rydberg excitation was created during the gate pulse. The gain offers the possibility to distribute the transistor output to the inputs of many transistors, thus making complex computational tasks possible.

D. Tiarks et al. PRL 113, 053602 (2014); see also H. Gorniaczyk et al. PRL 113, 053601 (2014).
S. Baur et al. PRL 112, 073901 (2014).