Atomic-ensemble-based Photonic Memories for Quantum Networking
September 14th, 2018 PATRICK LEDINGHAM Univesity of Oxford

Quantum interfaces between light and matter play a pivotal role for future quantum-based technologies. Such an interface would allow for the realisation of a quantum optical memory (QM), a device that can store and retrieve quantum states of light efficiently and on-demand. The key attribute of a QM is its ability to synchronise non-deterministic processes, such as the generation of multi-photon states, implementation of quantum photonic gate operations, and the establishment and distribution of remote entanglement. Atomic-ensembled-based systems are well suited for QMs where light can be efficiently mapped into and stored as long-lived excitations within the atomic medium.

In this talk I will introduce a novel protocol, off-resonant cascaded absorption – ORCA, as a candidate for a QM. I will present results demonstrating the storage and on-demand recall of a heralded GHz-band single photon, showing the preservation of the quantum nature of the retrieved light. Further, I will discuss the use the ORCA memory to perform temporal-mode-selective operations for the interfacing and optimal filtering of solid-state single-photon emitters. Finally, I will present preliminary results toward the implementation of the ORCA protocol on a solid-state platform.

Seminar, September 14, 2018, 15:00. ICFO’s Seminar Room

Hosted by Hugues de Riedmatten