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Q: Fachverband Quantenoptik und Photonik

Q 19: Quantum Information (Quantum Repeater) I

Q 19.3: Talk

Monday, March 11, 2019, 16:45–17:00, S HS 001 Chemie

Optical Quantum Information Processing with Atom-Filled Hollow-Core Photonic Crystal Fibres — •Ben Sparkes, Jed Rowland, Christoper Perrella, Jonathan Hedger, Ashby Hilton, Philip Light, and Andre Luiten — Institute for Photonics and Advanced Sensing, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005 Australia

Quantum information networks will deliver the capability for long-distance, provably-secure communications via quantum key distribution, as well as optical quantum computing. Our work aims to provide components for these quantum networks: our specific design makes use of hollow-core photonic crystal fibres (HCPCFs) filled with rubidium atoms, and are amenable to direct integration with current optical fibre technology. The tight transverse confinement (diameter of tens of microns) and extended interaction lengths (centimetres) of the HCPCFs provides an extremely optically dense medium, ideal for efficient quantum information storage and for achieving strong atom-mediated photon-photon interactions.

We will present results showing the efficient, coherent and noiseless storage of high-bandwidth optical pulses in warm rubidium-filled HCPCFs using the off-resonance cascade absorption (ORCA) technique. We have also recently demonstrated the ability to load a record number of laser-cooled atoms into a hollow-core optical fibre and will present our latest results towards achieving high efficiency storage with coherence times of up to milliseconds using the highly-efficient Gradient Echo Memory (GEM) technique.