Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session W49: Defect Qubits IV - Rare Earth Ions for Quantum Networking
3:00 PM–5:12 PM,
Thursday, March 7, 2024
Room: 200G
Sponsoring
Unit:
DQI
Chair: Leon Zaporski
Abstract: W49.00002 : Development and defects control in the qubit hosts for quantum information processing*
3:12 PM–3:24 PM
Presenter:
Satya K Kushwaha
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Authors:
Satya K Kushwaha
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Brandon Wilfong
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Shannon Bernier
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Abby Neill
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Mekhola Sinha
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Morgan Dierolf
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Aviana Judd
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Gannon B Murray
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
Tyrel M McQueen
(Institute for Quantum Matter, William H. Miller III Department of Physics and Astronomy, Johns Hopkins University)
We present our results in the development and characterization of these and related host materials. In YVO4, the V4+ ion is adjacent to an O vacancy and the V4+ leads to a yellow color. In CaWO4 the yellow color is due to W5+. To avoid the O-related paramagnetic defects, we employ our state-of-the-art optical floating zone techniques to grow high-purity crystals, and both crystals were grown in high PO2 environments. In YVO4 growth to compensate for the evaporation of V, the crystals were grown from V-rich compositions. O-related defects were further improved by annealing in O2 atmosphere. We also performed a lanthanide-doping in Ca1-xLnxWO4 and we observed the creation of uncompensated charge-related centers, potentially W5+. The quality of crystals was assessed by x-ray diffraction and EPR. If time permits, other W5+ hosts will be discussed.
*This research was supported by the US Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA). A portion of the synthetic work leveraged facilities supported by the National Science Foundation (Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM)) under Cooperative Agreement No. DMR-2039380.
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