300 citations · 648 across the 17 of their papers we have counts for
12 papers · 1 filter
Progress towards efficient 4-level photon echo memories
James Stuart, Kieran Smith, Morgan Hedges +2
Quantum memories could benefit many devices in quantum information processing. For a quantum to be useful in real-world applications, the quantum memory must have a high recall eff…
Millisecond electron spin coherence time for erbium ions in silicon
Ian R. Berkman, Alexey Lyasota, Gabriele G. de Boo +12
Spins in silicon that are accessible via a telecom-compatible optical transition are a versatile platform for quantum information processing that can leverage the well-established…
Effect of a hybrid transition moment on Stark-modulated photon echoes in Er:YSiO
Rose L. Ahlefeldt, Alexey Lyasota, Jodie Smith +2
The 1538 nm I - I transition of Er has an unusual hybrid electric-magnetic dipole character, and signatures of the hybrid moment can be expecte…
Optimising the Efficiency of a Quantum Memory based on Rephased Amplified Spontaneous Emission
Charlotte K. Duda, Kate R. Ferguson, Rose L. Ahlefeldt +2
We studied the recall efficiency as a function of optical depth of rephased amplified spontaneous emission (RASE), a protocol for generating entangled light. The experiments were p…
The Zeeman and hyperfine interactions of a single ion in Si
Jiliang Yang, Wenda Fan, Yangbo Zhang +10
Er-doped Si is a promising candidate for quantum information applications due to its telecom wavelength optical transition and its compatibility with Si nanofabrication technologie…
Optical and Zeeman spectroscopy of individual Er ion pairs in silicon
Guangchong Hu, Rose L. Ahlefeldt, Gabriele G. de Boo +6
We make the first study the optical energy level structure and interactions of pairs of single rare earth ions using a hybrid electro-optical detection method applied to Er-implant…
Sub-megahertz homogeneous linewidth for Er in Si via in situ single photon detection
Ian R. Berkman, Alexey Lyasota, Gabriele G. de Boo +9
We studied the optical properties of a resonantly excited trivalent Er ensemble in Si accessed via in situ single photon detection. A novel approach which avoids nanofabrication on…
Initialisation protocol for efficient quantum memories using resolved hyperfine structure
James Stuart, Morgan Hedges, Rose Ahlefeldt +1
We describe a quantum memory spectral preparation strategy that maximises memory efficiency and bandwidth in materials such as 167 Er3+:Y2SiO5 in a high field regime, where the hyp…
Quantum processing with ensembles of rare earth ions in a stoichiometric crystal
R. L. Ahlefeldt, M. J. Pearce, M. R. Hush +1
We describe a method for creating small quantum processors in a crystal stoichiometric in an optically active rare earth ion. The crystal is doped with another rare earth, creating…
Microwave to optical photon conversion via fully concentrated rare-earth ion crystals
Jonathan. R. Everts, Matthew. C. Berrington, Rose. L. Ahlefeldt +1
Most investigations of rare earth ions in solids for quantum information have used rare earth ion doped crystals. Here we analyse the conversion of quantum information from microwa…
Coherence time of over a second in a telecom-compatible quantum memory storage material
Miloš Rančić, Morgan P. Hedges, Rose L. Ahlefeldt +1
Quantum memories for light will be essential elements in future long-range quantum communication networks. These memories operate by reversibly mapping the quantum state of light o…
Quantum state transfer through time reversal of an optical channel
M. R. Hush, C. D. B. Bentley, R. L. Ahlefeldt +3
Rare earth ions have exceptionally long coherence times, making them an excellent candidate for quantum information processing. A key part of this processing is quantum state trans…