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Seminar PLUM: Tuesday, 10th October 2023 at 11:00 am

Kieran Smith (Department of Quantum Science and Technology, Australian National University)

Title: Enabling the quantum internet through erbium-based quantum technologies


Institut Néel, Room K223 (Rémy Lemaire)

Abstract: A global quantum network is an important piece of infrastructure for a number of quantum technologies. This includes technologies such as provably secure communications through quantum key distribution, and distributed quantum computing. Constructing a global quantum network will likely require a number of separate quantum technologies such as microwave to optical interconnects, quantum memories, and quantum processors.
Rare-earth ions doped into crystals are promising materials for developing such quantum technologies because of their long coherence times and narrow optical line widths. Erbium is of particular interest due to its 1530-1540 nm optical transition in the fiber-optic telecommunications C-band. I will present an overview of my group’s research studying rare-earth ion crystals to develop technologies for quantum networks. In particular, I will discuss our research into using europium doped crystal to improve crystal field models for the rare-earth ions, a material study of erbium implanted in silicon, optical-microwave transduction using stoichiometric erbium crystals, and the development of a telecom-compatible quantum memory using a dilute erbium doped crystal.