The Rare-Earth Materials Optimisation Program, led by Dr Rose Ahlefeldt at the Australian National University, was created by the Centre in 2021 to provide the fundamental material investigations to support the development of quantum information devices based on rare-earth optical centres. These devices typically use rare earth ions with complicated optical and spin structure in low symmetry sites, resulting in complex optical properties not well characterised to date.

The program focuses on building the experimental and theoretical understanding of the optical and spin properties of these complex optical centres. This understanding will be use to optimise the performance of current quantum information devices and guide the development of new applications.


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Initialization protocol for efficient quantum memories using resolved hyperfine structure JS Stuart, M Hedges, R Ahlefeldt, M Sellars Physical Review Research, 3, L032054 (2021)
Quantum processing with ensembles of rare-earth ions in a stoichiometric crystal RL Ahlefeldt, MJ Pearce, MR Hush, MJ Sellars Physical Review A, 101, 012309 (2020)
Piezospectroscopic measurement of high-frequency vibrations in a pulse-tube cryostat A Louchet-Chauvet, R Ahlefeldt, T Chaneliere Review of Scientific Instruments, 90, 034901 (2019)
Microwave to optical photon conversion via fully concentrated rare-earth-ion crystals JR Everts, MC Berrington, RL Ahlefeldt, JJ Longdell Physical Review A, 99, 063830 (2019)
Quantum information processing using frozen core Y3+ spins in Eu3+:Y2SiO5 MJ Zhong, RL Ahlefeldt, MJ Sellars New Journal of Physics, 21, 033019 (2019)