Hannover 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 69: Quantum Information: Quantum Computing and Communication IV

Q 69.3: Vortrag

Freitag, 4. März 2016, 15:00–15:15, e214

Higher-efficiency lower-noise Raman quantum memory — Sarah Thomas^{1, 2}, Joseph Munns^{1, 2}, •Benjamin Brecht¹, Patrick M. Ledingham¹, Dylan J. Saunders¹, Joshua Nunn¹, and Ian A. Walmsley¹ — ¹Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK — ²QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, UK

Raman quantum memories in warm atomic vapour promise excellent applicability in future quantum networks, owing to their experimental simplicity and large time-bandwidth product. However, they suffered from intrinsic four-wave noise and moderate efficiencies, which ultimately limited their usefulness.

Here, we report on experimental progress that allowed us to demonstrate on the one hand high noise suppression with only 0.015 noise photons per pulse, and on the other hand high memory efficiency of up to 60% in a warm Cs vapour Raman memory. These steps facilitate the future realization of a genuine quantum memory operating on single photons.